1955  -97.1205  18.7756
1956  -82.1429  18.6614
1957  -92.4047  18.4767
1958  -52.8802  18.3425
1959  -75.4789  18.4927
1960  -47.181  18.2851
1961  -39.766  18.2708
1962  -24.5707  18.1608
1963  -34.7611  18.0491
1964  -31.2113  17.9282
1965  -23.0433  17.7951
1966  -22.557  17.755
1967  -40.3275  17.5343
1968  -62.6654  17.2976
1969  -57.2904  17.2787
1970  -36.3353  17.1022
1971  -12.0424  16.7214
1972  -19.8724  16.8246
1973  -11.7035  16.8546
1974  -14.8461  17.1034
1975  11.7848  17.1665
1976  4.29456  16.9563
1977  2.56605  16.9884
1978  -5.26208  16.9116
1979  -7.27184  16.7119
1980  38.5807  16.6138
1981  44.1159  16.6093
1982  24.0084  16.5542
1983  17.2614  16.4842
1984  37.3092  16.5729
1985  42.4723  16.3358
1986  40.1754  16.3597
1987  25.9645  16.1981
1988  53.3639  16.2381
1989  50.7047  16.3098
1990  50.9244  16.1645
1991  68.6129  16.1507
1992  80.9782  16.0663
1993  77.7409  15.959
1994  81.9938  16.2222
1995  66.9694  16.0132
1996  92.9264  15.9819
1997  105.279  15.955
1998  89.7321  15.8575
1999  114.173  15.8989
2000  100.205  16.0288
2001  129.01  16.1057
2002  155.313  15.9106
2003  189.92  15.255
2004  181.799  14.5769
2005  187.665  14.071
2006  194.461  13.9657
2007  181.051  13.8799
2008  201.182  13.8617
2009  212.921  13.8079
2010  217.381  13.7769
2011  230.556  13.7561
2012  233.141  13.7532
2013  258.97  14.1986
2014  267.557  14.2422
2015  286.961  14.1221
2016  277.304  14.0947
2017  302.484  13.2363
2018  296.14  14.2956