YEAR AO AOse NA NAse SA SAse 1957.5 -15.128 4.133 -15.573 4.832 -14.608 3.320 1958.5 -12.946 3.412 -10.262 3.537 -16.067 3.267 1959.5 -13.790 3.462 -11.168 3.345 -16.839 3.600 1960.5 -9.449 3.293 -7.968 3.023 -11.171 3.607 1961.5 -10.154 2.998 -9.621 3.005 -10.772 2.989 1962.5 -8.140 2.771 -8.521 2.791 -7.696 2.748 1963.5 -11.292 3.082 -11.177 2.821 -11.425 3.386 1964.5 -11.123 3.075 -12.570 2.765 -9.437 3.436 1965.5 -13.299 3.124 -12.073 2.898 -14.723 3.388 1966.5 -11.890 2.961 -11.959 2.784 -11.808 3.168 1967.5 -13.422 2.888 -13.926 2.527 -12.833 3.307 1968.5 -13.323 2.488 -16.716 2.058 -9.374 2.988 1969.5 -11.589 2.443 -16.269 1.844 -6.144 3.139 1970.5 -8.257 2.205 -10.804 1.465 -5.293 3.065 1971.5 -7.966 2.194 -9.616 1.382 -6.045 3.138 1972.5 -9.162 2.251 -10.643 1.238 -7.437 3.429 1973.5 -8.133 2.205 -7.735 1.267 -8.595 3.296 1974.5 -7.630 2.046 -6.024 1.404 -9.497 2.793 1975.5 -6.566 2.061 -6.806 1.412 -6.286 2.816 1976.5 -7.676 2.138 -7.897 1.549 -7.417 2.823 1977.5 -3.984 1.830 -2.667 1.490 -5.517 2.226 1978.5 -1.763 1.787 0.296 1.459 -4.158 2.170 1979.5 -1.704 1.664 0.563 1.200 -4.341 2.205 1980.5 -1.672 1.737 0.493 1.260 -4.191 2.293 1981.5 3.287 1.488 2.125 1.125 4.638 1.910 1982.5 2.646 1.402 4.029 1.052 1.036 1.808 1983.5 3.029 1.316 3.936 0.945 1.973 1.748 1984.5 4.052 1.244 3.896 0.953 4.234 1.583 1985.5 5.539 1.171 5.651 0.893 5.407 1.495 1986.5 5.387 1.407 6.474 1.090 4.121 1.775 1987.5 5.310 1.382 5.777 1.017 4.766 1.807 1988.5 5.452 1.228 7.671 1.058 2.870 1.425 1989.5 6.954 1.202 10.022 1.128 3.383 1.287 1990.5 8.432 1.051 11.727 0.956 4.598 1.161 1991.5 11.066 1.036 12.102 1.010 9.859 1.065 1992.5 11.821 1.106 13.754 1.147 9.571 1.058 1993.5 12.092 1.169 12.318 1.357 11.826 0.950 1994.5 13.250 1.171 14.462 1.369 11.840 0.941 1995.5 11.272 1.279 10.890 1.421 11.715 1.112 1996.5 11.091 1.276 10.617 1.302 11.640 1.246 1997.5 10.141 1.607 9.855 1.357 10.473 1.898 1998.5 9.458 1.482 11.273 1.218 7.344 1.788 1999.5 10.357 1.386 11.751 1.030 8.735 1.802 2000.5 11.869 1.304 9.491 0.954 14.635 1.712 2001.5 11.007 1.064 12.805 0.870 8.914 1.290 2002.5 12.695 0.888 16.582 0.767 8.170 1.028 2003.5 18.220 0.748 21.562 0.765 14.330 0.727 2004.5 20.035 0.710 23.602 0.832 15.882 0.568 2005.5 20.300 0.702 24.669 0.872 15.214 0.503 2006.5 19.491 0.670 24.312 0.829 13.879 0.484 2007.5 18.869 0.705 23.110 0.896 13.934 0.482 2008.5 19.357 0.679 22.904 0.809 15.228 0.528 2009.5 18.524 0.727 22.284 0.905 14.147 0.520 2010.5 21.051 0.616 26.763 0.701 14.404 0.518 2011.5 22.938 0.501 27.807 0.577 17.270 0.411 2012.5 24.893 0.444 29.594 0.513 19.421 0.364 2013.5 26.099 0.411 30.436 0.495 21.051 0.314 2014.5 28.261 0.403 32.503 0.469 23.325 0.325 2015.5 29.369 0.402 34.009 0.468 23.967 0.325 2016.5 30.902 0.376 35.804 0.435 25.197 0.306 2017.5 30.673 0.390 35.107 0.463 25.510 0.306 2018.5 32.037 0.375 37.296 0.446 25.915 0.294 2019.5 32.942 0.385 37.973 0.469 27.085 0.286 2020.5 33.414 0.385 38.824 0.477 27.115 0.278 2021.5 35.689 0.390 42.037 0.465 28.300 0.302