Year,Value,NumPoints 1900,-0.140342,2441 1901,-0.113218,2533 1902,-0.391575,2570 1903,-0.318866,2637 1904,-0.405807,2674 1905,-0.304335,2683 1906,-0.129215,2770 1907,-0.570398,2845 1908,-0.418381,2876 1909,-0.434364,2890 1910,-0.274966,2947 1911,-0.383763,2947 1912,-0.5005,3104 1913,-0.32227,3061 1914,-0.0701345,3112 1915,-0.140443,3126 1916,-0.411189,3191 1917,-0.6927,3177 1918,-0.441557,3145 1919,-0.357867,3134 1920,-0.257632,3174 1921,-0.0410672,3292 1922,-0.244547,3385 1923,-0.215257,3403 1924,-0.228804,3502 1925,-0.12759,3518 1926,0.0100985,3588 1927,-0.179486,3633 1928,-0.0786868,3663 1929,-0.431826,3788 1930,-0.0564583,3850 1931,-0.0197028,3950 1932,-0.0256498,4077 1933,-0.301845,4220 1934,0.0551808,4253 1935,-0.0992315,4302 1936,-0.0437343,4463 1937,0.109825,4493 1938,0.286854,4506 1939,0.0890003,4520 1940,0.0691653,4582 1941,0.0153539,4702 1942,0.0421699,4734 1943,0.133349,4848 1944,0.174846,4906 1945,-0.0518745,4935 1946,-0.0130658,5026 1947,0.0979439,5127 1948,0.0865619,5253 1949,-0.016338,5358 1950,-0.187873,5443 1951,-0.0406331,5765 1952,0.0224831,5876 1953,0.210442,5933 1954,-0.0477239,5979 1955,-0.0957225,6073 1956,-0.32959,6219 1957,0.00811751,7170 1958,0.115706,7325 1959,0.0804329,7366 1960,0.00902043,7366 1961,0.107181,7452 1962,0.0979087,7441 1963,0.0801395,7542 1964,-0.237666,7505 1965,-0.162419,7513 1966,-0.0736409,7527 1967,-0.00929841,7561 1968,-0.136046,7545 1969,-0.0526121,7129 1970,0.0267296,7538 1971,-0.0838028,7612 1972,-0.130602,7603 1973,0.239941,7551 1974,-0.13793,7519 1975,0.0584254,7512 1976,-0.225128,7466 1977,0.206801,7478 1978,0.0648812,7520 1979,0.140867,7480 1980,0.276583,7476 1981,0.476843,7392 1982,0.0826415,7374 1983,0.367619,7405 1984,0.101784,7397 1985,0.104471,7370 1986,0.213009,7381 1987,0.349537,7422 1988,0.511566,7421 1989,0.346009,7343 1990,0.601038,7196 1991,0.495365,7137 1992,0.185966,7071 1993,0.267326,7185 1994,0.438128,7138 1995,0.699472,7097 1996,0.411467,7128 1997,0.57151,7105 1998,0.904792,7155 1999,0.658795,7097 2000,0.585169,7114 2001,0.770759,7094 2002,0.887004,7097 2003,0.868422,7064 2004,0.753728,7069 2005,1.02865,7131 2006,0.922737,7142 2007,1.02295,7175 2008,0.810612,7177 2009,0.88773,7179 2010,1.10835,7173 2011,0.898676,7137 2012,0.91553,7120 2013,1.01161,7096 2014,1.01226,7030 2015,1.25475,6998 2016,1.49537,7000 2017,1.35765,6971 2018,1.21549,6969 2019,1.39006,6980 2020,1.52829,6933 2021,1.28563,6937 2022,1.28649,6964