1950   /  1: -1.531
 1951   /  2: -1.229
 1952   /  3: -0.803
 1953   /  4: -1.025
 1954   /  5: -1.346
 1955   /  6: -1.170
 1956   /  7: -1.808
 1957   /  8: -1.093
 1958   /  9: -1.300
 1959   / 10: -1.315
 1960   / 11: -0.615
 1961   / 12: -1.602
 1962   / 13: -1.070
 1963   / 14: -1.283
 1964   / 15: -2.017
 1965   / 16: -1.649
 1966   / 17: -0.999
 1967   / 18: -1.419
 1968   / 19: -0.891
 1969   / 20: -0.964
 1970   / 21: -1.189
 1971   / 22: -1.597
 1972   / 23: -0.509
 1973   / 24: -0.842
 1974   / 25: -1.204
 1975   / 26: -1.603
 1976   / 27: -0.961
 1977   / 28: -1.243
 1978   / 29: -1.067
 1979   / 30: -0.461
 1980   / 31: -0.660
 1981   / 32: -0.635
 1982   / 33: -1.143
 1983   / 34: -1.208
 1984   / 35: -1.011
 1985   / 36: -1.157
 1986   / 37: -0.943
 1987   / 38: -0.745
 1988   / 39: -0.877
 1989   / 40: -0.834
 1990   / 41: -0.090
 1991   / 42: -0.861
 1992   / 43: -0.706
 1993   / 44: -0.120
 1994   / 45: -0.529
 1995   / 46: -0.496
 1996   / 47: -0.777
 1997   / 48: -0.126
 1998   / 49: -0.172
 1999   / 50: -0.370
 2000   / 51: -0.826
 2001   / 52: -0.041
 2002   / 53: -0.153
 2003   / 54:  0.518
 2004   / 55:  0.171
 2005   / 56:  0.050
 2006   / 57:  0.330
 2007   / 58: -0.137
 2008   / 59: -0.087
 2009   / 60:  0.262
 2010   / 61:  0.721
 2011   / 62: -0.337
 2012   / 63:  0.366
 2013   / 64: -0.154
 2014   / 65:  0.046
 2015   / 66:  1.058
 2016   / 67:  0.748
 2017   / 68:  0.101
 2018   / 69:  0.460
 2019   / 70:  0.575
 2020   / 71:  0.489
 2021   / 72:  0.465
 2022   / 73:  0.538
 2023   / 74:  1.292
 2024   / 75:  0.682
 2025   / 76:  0.640