1955  -100.074  18.8202
1956  -78.3276  18.7173
1957  -96.0571  18.5565
1958  -59.3754  18.4065
1959  -77.6176  18.5685
1960  -49.978  18.373
1961  -34.9692  18.3481
1962  -16.2719  18.2372
1963  -22.3266  18.1324
1964  -25.7084  18.0316
1965  -24.9799  17.8768
1966  -15.1498  17.804
1967  -41.9399  17.6141
1968  -59.9028  17.3496
1969  -50.3998  17.3217
1970  -35.7905  17.1332
1971  -11.7426  16.7453
1972  -18.0473  16.848
1973  -13.3364  16.9063
1974  -18.3549  17.1521
1975  8.61383  17.2159
1976  -1.95062  17.0023
1977  -2.69183  17.0454
1978  -1.5346  16.9508
1979  1.6529  16.7184
1980  34.7828  16.5984
1981  42.2174  16.6104
1982  20.4547  16.5706
1983  11.9615  16.4732
1984  24.7144  16.5841
1985  39.2955  16.3618
1986  41.5738  16.3595
1987  22.8218  16.1468
1988  47.3814  16.1836
1989  49.9  16.2664
1990  49.7271  15.8611
1991  60.6295  15.854
1992  86.9996  15.733
1993  89.3853  15.6041
1994  90.6392  15.8802
1995  61.3853  15.6322
1996  91.2105  15.6158
1997  98.5259  15.5612
1998  83.7935  15.4372
1999  115.919  15.4361
2000  101.628  15.5685
2001  122.172  15.5742
2002  152.154  15.245
2003  183.751  14.3756
2004  177.325  13.4962
2005  181.383  12.7153
2006  195.192  12.3552
2007  176.998  12.0729
2008  194.809  11.8313
2009  208.993  11.6051
2010  210.681  11.5694
2011  224.877  11.5299
2012  227.43  11.472
2013  256.002  11.926
2014  262.872  11.9319
2015  282.153  11.774
2016  271.553  11.793
2017  301.724  11.7671
2018  308.563  11.8138
2019  328.054  12.0085
2020  333.006  12.1462
2021  350.48  12.6691
2022  367.651  12.903
2023  368.235  12.9692