Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1919 7.163 6.956 6.832 7.411 7.908 8.115 8.363 8.322 8.57 8.695 8.819 8.695 6.983 7.811 8.419 8.736 7.987 1920 8.943 8.778 8.695 8.529 8.529 8.115 7.742 7.535 7.287 6.79 6.045 5.714 8.805 8.391 7.522 6.183 7.725 1921 6.045 6.376 6.707 6.997 7.204 7.494 7.618 7.742 7.825 7.991 7.949 7.949 6.376 7.232 7.729 7.963 7.325 1922 8.032 8.032 8.115 7.908 8.363 8.695 8.695 8.902 8.902 9.109 9.523 9.606 8.06 8.322 8.833 9.412 8.657 1923 9.15 9.564 9.771 9.688 9.606 9.481 8.985 9.109 9.523 9.357 9.15 8.695 9.495 9.592 9.205 9.067 9.34 1924 8.985 9.15 9.15 8.985 8.695 8.363 8.115 8.57 9.316 9.606 9.606 9.357 9.095 8.681 8.667 9.523 8.991 1925 9.606 9.937 9.813 9.937 9.688 9.523 9.564 9.937 10.309 10.392 10.309 9.978 9.785 9.716 9.937 10.227 9.916 1926 10.144 10.309 10.268 10.144 9.895 9.978 9.771 10.268 11.096 11.013 10.723 10.309 10.24 10.006 10.378 10.682 10.327 1927 10.475 10.765 10.889 10.806 10.723 10.93 10.682 10.889 11.345 11.179 10.889 10.268 10.71 10.82 10.972 10.779 10.82 1928 10.558 10.889 10.889 10.723 10.765 10.765 10.599 11.179 11.759 11.8 11.717 11.179 10.779 10.751 11.179 11.565 11.069 1929 11.552 11.8 11.924 12.131 12.131 12.131 11.8 12.173 12.794 12.752 12.007 11.013 11.759 12.131 12.255 11.924 12.017 1930 11.345 11.386 11.303 11.51 11.179 10.93 10.558 10.558 11.262 10.93 10.475 9.771 11.345 11.207 10.792 10.392 10.934 1931 9.937 10.392 10.475 10.723 10.723 10.558 10.392 10.558 10.889 10.185 9.688 9.109 10.268 10.668 10.613 9.661 10.303 1932 9.316 9.523 9.274 8.736 8.529 8.281 7.991 8.695 9.937 10.02 9.523 8.819 9.371 8.515 8.874 9.454 9.054 1933 8.985 9.15 8.529 9.316 10.558 11.717 11.883 11.262 11.51 10.723 10.185 9.688 8.888 10.53 11.552 10.199 10.292 1934 10.02 10.516 10.765 10.889 10.723 10.392 10.185 10.682 10.558 10.309 10.682 10.765 10.434 10.668 10.475 10.585 10.541 1935 11.096 11.386 11.345 11.262 11.179 11.345 11.51 11.883 12.669 12.669 12.338 12.131 11.276 11.262 12.021 12.38 11.734 1936 11.966 11.8 12.131 12.38 12.504 12.669 12.794 13.58 14.326 14.243 14.16 14.077 11.966 12.518 13.567 14.16 13.052 1937 13.994 14.367 14.533 14.657 14.657 14.491 14.119 14.243 14.367 13.373 12.007 11.013 14.298 14.602 14.243 12.131 13.818 1938 11.013 11.345 11.51 11.262 11.303 11.51 12.173 13.083 13.87 13.58 13.456 13.125 11.289 11.358 13.042 13.387 12.269 1939 13.001 13.001 13.001 12.918 13.001 13.166 13.332 13.497 13.912 14.45 14.574 14.574 13.001 13.028 13.58 14.533 13.535 1940 14.16 13.912 13.539 13.663 13.912 14.284 14.119 13.994 14.243 14.574 15.071 15.526 13.87 13.953 14.119 15.057 14.25 1941 15.526 16.065 16.354 16.727 17.265 17.514 17.514 17.721 17.762 17.928 18.259 18.052 15.982 17.169 17.665 18.079 17.224 1942 18.176 18.093 17.886 17.762 17.431 17.1 17.307 17.721 17.969 18.425 18.549 18.632 18.052 17.431 17.665 18.535 17.921 1943 18.425 18.714 18.549 18.673 18.839 19.128 19.253 19.667 19.956 19.915 20.039 19.46 18.563 18.88 19.625 19.805 19.218 1944 19.667 19.749 19.832 19.708 19.667 19.832 19.667 20.329 20.329 20.288 20.495 20.412 19.749 19.736 20.108 20.398 19.998 1945 20.412 20.453 20.288 20.246 20.163 20.453 20.039 19.46 19.708 19.335 19.625 19.253 20.384 20.288 19.736 19.404 19.953 1946 19.749 20.453 20.246 20.081 19.915 20.081 19.832 20.702 21.157 21.24 21.53 21.53 20.15 20.025 20.564 21.433 20.543 1947 21.323 21.613 21.406 20.702 20.412 20.66 19.832 21.695 22.109 22.855 22.523 21.53 21.447 20.591 21.212 22.303 21.388 1948 21.902 22.316 21.861 21.737 21.695 22.234 20.826 22.482 23.103 23.227 22.399 21.323 22.027 21.889 22.137 22.316 22.092 1949 21.488 21.737 21.488 20.66 20.536 21.074 19.956 22.275 23.02 23.724 22.73 21.944 21.571 20.757 21.751 22.799 21.72 1950 22.482 23.02 23.02 23.02 23.02 23.683 23.02 26.001 25.919 26.415 25.422 25.132 22.841 23.241 24.98 25.656 24.18 1951 25.463 26.001 25.711 25.008 24.718 25.132 23.31 25.049 25.422 25.297 24.801 23.931 25.725 24.952 24.594 24.676 24.987 1952 24.428 25.132 25.09 24.262 24.014 25.297 23.807 26.208 26.871 27.45 26.995 25.836 24.883 24.525 25.629 26.76 25.449 1953 25.836 26.829 27.078 26.498 26.705 26.995 25.297 27.119 27.285 27.45 26.457 24.718 26.581 26.733 26.567 26.208 26.522 1954 25.38 26.126 26.415 26.043 26.208 26.664 25.215 27.078 27.989 28.403 27.823 27.036 25.974 26.305 26.76 27.754 26.698 1955 27.699 28.444 29.231 29.024 29.396 29.893 28.071 30.017 30.97 31.674 31.011 29.976 28.458 29.438 29.686 30.887 29.617 1956 30.39 31.053 31.053 30.97 30.763 30.97 29.272 31.674 32.46 32.791 31.632 30.431 30.832 30.901 31.135 31.618 31.122 1957 30.846 31.756 32.005 31.26 31.384 31.839 30.266 32.584 33.205 32.998 31.549 30.017 31.536 31.494 32.019 31.522 31.643 1958 30.266 30.68 30.638 30.39 30.763 31.963 30.556 33.371 33.951 34.448 33.661 31.963 30.528 31.039 32.626 33.357 31.888 1959 32.998 34.158 34.365 34.862 34.944 35.441 33.951 36.559 36.973 36.766 35.524 34.158 33.84 35.082 35.828 35.483 35.058 1960 35.151 35.566 35.938 36.145 36.187 36.642 34.572 36.808 37.139 37.346 35.607 33.62 35.552 36.325 36.173 35.524 35.893 1961 34.158 35.151 35.731 36.352 36.559 37.553 35.566 38.588 38.795 39.747 38.754 36.973 35.013 36.821 37.649 38.491 36.994 1962 36.973 38.381 39.002 39.168 39.333 39.996 37.801 40.451 41.155 41.114 39.83 37.925 38.119 39.499 39.802 39.623 39.261 1963 38.588 39.954 40.658 41.155 41.362 42.356 39.54 42.853 43.598 44.136 42.48 40.161 39.733 41.624 41.997 42.259 41.403 1964 41.362 42.728 42.521 43.805 44.177 45.047 42.48 45.668 46.165 46.827 45.171 43.06 42.204 44.343 44.771 45.019 44.084 1965 44.509 45.627 46.248 46.289 46.662 47.945 45.088 48.525 49.394 50.057 48.401 46.041 45.461 46.965 47.669 48.166 47.065 1966 47.076 48.401 49.311 49.27 49.725 51.257 48.194 51.671 52.748 53.038 51.216 48.483 48.263 50.084 50.871 50.912 50.033 1967 49.436 50.294 50.321 51.184 50.277 52.199 48.646 53.15 54.591 54.964 53.255 50.804 50.017 51.22 52.129 53.008 51.593 1968 51.185 52.995 53.666 53.83 54.479 56.41 52.797 56.889 58.427 58.372 56.796 53.275 52.615 54.906 56.037 56.148 54.927 1969 54.2 56.567 57.285 57.13 57.488 59.457 56.388 59.87 60.864 60.605 58.399 55.418 56.017 58.025 59.041 58.141 57.806 1970 55.515 57.421 57.2 57.56 57.582 59.425 56.261 58.928 60.511 60.3 57.807 55.157 56.712 58.189 58.567 57.755 57.806 1971 55.989 57.717 57.967 58.809 59.102 61.564 58.452 62.018 63.963 64.403 62.402 59.485 57.224 59.825 61.478 62.096 60.156 1972 60.812 63.025 63.925 64.832 64.866 67.503 63.029 68.044 69.525 69.546 67.328 63.995 62.587 65.734 66.866 66.956 65.536 1973 64.19 67.26 68.006 68.164 68.695 70.929 66.872 71.508 72.624 72.64 69.952 64.652 66.485 69.263 70.335 69.081 68.791 1974 65.474 67.964 69.091 68.551 69.337 71.66 67.205 71.344 72.278 70.671 66.485 59.976 67.51 69.849 70.276 65.71 68.336 1975 59.039 60.517 59.296 60.687 61.52 65.756 62.763 67.578 69.535 69.438 67.832 64.257 59.617 62.654 66.626 67.175 64.018 1976 65.364 69.194 69.189 69.324 69.753 72.226 68.415 72.265 74.932 74.649 72.34 68.746 67.916 70.434 71.871 71.912 70.533 1977 70.219 72.502 74.228 74.612 75.584 78.408 74.629 79.296 79.469 78.686 77.106 73.548 72.316 76.201 77.798 76.446 75.69 1978 73.442 75.805 76.513 78.15 78.348 81.796 78.075 81.964 83.147 82.097 80.317 77.204 75.253 79.431 81.062 79.872 78.905 1979 75.886 78.497 79.379 79.172 79.79 81.862 78.59 82.518 82.826 82.763 80.192 77.019 77.921 80.275 81.311 79.991 79.875 1980 76.973 78.91 78.939 77.627 76.203 77.949 74.95 79.75 81.873 80.942 78.857 76.385 78.274 77.26 78.858 78.728 78.28 1981 75.954 78.644 78.995 78.84 79.48 81.868 79.76 82.941 83.615 81.378 78.275 74.117 77.864 80.062 82.105 77.923 79.489 1982 73.252 77.395 77.249 76.262 76.556 79.48 76.55 81.094 82.026 80.72 77.734 73.595 75.965 77.433 79.89 77.35 77.66 1983 75.04 77.253 78.353 78.837 80.558 84.065 81.968 86.805 88.949 87.28 84.018 79.652 76.882 81.153 85.908 83.65 81.898 1984 80.398 83.377 84.003 84.021 84.769 88.423 85.665 89.046 89.83 88.432 85.059 81.056 82.593 85.737 88.18 84.849 85.34 1985 80.456 83.34 84.009 84.092 85.402 88.567 85.47 90.191 91.766 89.391 86.319 82.868 82.602 86.02 89.142 86.193 85.989 1986 83.868 86.01 85.185 86.969 87.658 91.702 89.079 93.92 93.704 93.308 90.1 87.756 85.021 88.776 92.234 90.388 89.105 1987 86.583 90.038 90.602 91.072 92.347 97.021 95.477 99.075 99.128 97.567 94.944 92.175 89.074 93.48 97.893 94.895 93.836 1988 91.565 93.608 93.931 94.659 94.362 97.866 96.189 100.745 100.296 99.136 96.263 93.76 93.034 95.629 99.077 96.386 96.032 1989 94.224 94.841 95.831 97.044 96.551 100.079 96.676 101.02 100.913 100.18 97.246 93.224 94.965 97.891 99.536 96.884 97.319 1990 94.734 96.286 96.395 95.995 96.871 100.262 98.018 102.411 102.576 100.845 97.001 93.69 95.805 97.709 101.002 97.179 97.924 1991 93.571 93.973 92.571 94.047 95.013 99.559 97.639 102.103 102.866 101.148 97 93.953 93.372 96.207 100.869 97.367 96.954 1992 94.944 95.462 96.962 97.806 98.299 102.642 101.649 105.216 105.737 103.912 100.399 96.974 95.789 99.582 104.201 100.428 100 1993 98.006 98.872 99.107 100.085 100.023 104.118 103.144 106.478 106.997 104.742 101.199 98.709 98.662 101.409 105.539 101.55 101.79 1994 98.83 100.085 101.863 102.876 104.016 108.207 106.283 110.729 110.824 109.485 106.198 103.424 100.259 105.033 109.279 106.369 105.235 1995 104.095 104.439 105.07 105.082 105.8 110.178 108.272 111.959 112.121 110.172 105.726 102.425 104.535 107.02 110.784 106.108 107.112 1996 102.022 103.436 104.429 104.917 105.467 110.144 109.307 113.053 114.104 112.127 108.261 105.828 103.295 106.843 112.155 108.739 107.758 1997 106.099 107.363 107.505 109.781 109.001 113.384 112.832 116.232 116.974 116.127 111.083 108.32 106.989 110.722 115.346 111.843 111.225 1998 109.204 109.151 109.312 110.702 110.587 114.216 113.428 115.661 115.056 114.464 110.089 106.856 109.222 111.835 114.715 110.47 111.56 1999 107.452 109.027 108.916 110.176 110.15 113.938 112.381 116.167 116.313 116.017 111.542 106.856 108.465 111.421 114.953 110.47 111.56