1880    -0.335318
    1881    -0.234964
    1882    -0.293076
    1883    -0.350843
    1884    -0.461794
    1885    -0.504901
    1886    -0.519719
    1887    -0.580893
    1888    -0.395503
    1889    -0.261142
    1890    -0.499535
    1891    -0.415798
    1892    -0.549848
    1893    -0.480397
    1894    -0.492089
    1895    -0.445332
    1896    -0.345386
    1897    -0.312174
    1898    -0.493210
    1899    -0.355139
    1900    -0.252111
    1901    -0.293819
    1902    -0.474857
    1903    -0.553288
    1904    -0.631151
    1905    -0.428610
    1906    -0.369337
    1907    -0.535870
    1908    -0.488375
    1909    -0.595150
    1910    -0.497797
    1911    -0.575569
    1912    -0.549846
    1913    -0.479020
    1914    -0.269020
    1915    -0.289554
    1916    -0.472238
    1917    -0.585941
    1918    -0.403420
    1919    -0.345430
    1920    -0.289199
    1921    -0.300593
    1922    -0.343980
    1923    -0.320941
    1924    -0.355845
    1925    -0.289774
    1926    -0.168900
    1927    -0.289942
    1928    -0.310233
    1929    -0.449650
    1930    -0.245070
    1931    -0.118532
    1932    -0.206633
    1933    -0.374424
    1934    -0.169402
    1935    -0.260257
    1936    -0.170615
    1937    0.0133089
    1938   -0.0532890
    1939   -0.0898559
    1940    0.0254172
    1941   -0.0318251
    1942   -0.0475145
    1943     0.101519
    1944    0.0860095
    1945   -0.0912038
    1946    -0.135125
    1947    -0.101265
    1948    -0.195638
    1949    -0.195907
    1950    -0.269973
    1951    -0.119647
    1952   -0.0135043
    1953    0.0227359
    1954    -0.175051
    1955    -0.153093
    1956    -0.238094
    1957   -0.0155101
    1958   -0.0266511
    1959   -0.0464653
    1960    -0.100600
    1961   -0.0110124
    1962   -0.0822285
    1963   -0.0416667
    1964    -0.301693
    1965    -0.173589
    1966    -0.106694
    1967   -0.0682278
    1968    -0.139022
    1969   -0.0183835
    1970   -0.0418511
    1971    -0.164090
    1972   -0.0682602
    1973    0.0865675
    1974    -0.131699
    1975   -0.0783226
    1976    -0.197952
    1977     0.152287
    1978    0.0324520
    1979    0.0906926
    1980     0.209027
    1981     0.287618
    1982    0.0583731
    1983     0.239729
    1984    0.0659608
    1985    0.0553803
    1986    0.0914797
    1987     0.231009
    1988     0.296813
    1989     0.178582
    1990     0.363986
    1991     0.345400
    1992     0.148690
    1993     0.180734
    1994     0.261579
    1995     0.403942
    1996     0.291759
    1997     0.425285
    1998     0.584586
    1999     0.330797
    2000     0.327928
    2001     0.487263
    2002     0.584523
    2003     0.556794
    2004     0.503189
    2005     0.641244
    2006     0.585281
    2007     0.619212
    2008     0.485158
    2009     0.624150
    2010     0.703062
    2011     0.570572
    2012     0.583820
    2013     0.640812
    2014     0.672607
    2015     0.824667
    2016     0.937497
    2017     0.847554
    2018     0.789519
    2019     0.929925
    2020     0.956930
    2021     0.795855
    2022     0.857706