Year,Value,NumPoints
1881,0.0904807,1115
1882,-0.646877,1129
1883,-0.745281,1058
1884,-0.639025,1122
1885,-0.744694,1094
1886,-0.039692,1094
1887,-0.267138,1073
1888,-0.0576897,1067
1889,-0.367766,1122
1890,-0.254087,1122
1891,-0.663286,1159
1892,-0.297554,1143
1893,0.155863,1199
1894,-0.180515,1211
1895,-0.35011,1244
1896,0.268058,1275
1897,-0.38838,1283
1898,-0.417532,1289
1899,0.186807,1291
1900,0.10565,1268
1901,0.54715,1312
1902,-0.13115,1316
1903,-0.313813,1317
1904,-0.378695,1337
1905,-0.222077,1319
1906,-0.0404456,1334
1907,-0.548072,1336
1908,0.233817,1337
1909,-0.387864,1338
1910,-0.181094,1344
1911,-0.287014,1304
1912,-0.777021,1370
1913,-0.170912,1368
1914,0.058291,1372
1915,-0.4095,1371
1916,-0.49137,1367
1917,-0.222182,1375
1918,-0.720347,1373
1919,-0.0871872,1365
1920,-0.532489,1373
1921,-0.123085,1379
1922,-0.480007,1367
1923,-0.347075,1385
1924,-0.606259,1400
1925,-0.30944,1400
1926,-0.247961,1419
1927,-0.356826,1405
1928,0.0193936,1422
1929,-0.338552,1424
1930,0.0776593,1430
1931,0.302506,1447
1932,0.0973185,1447
1933,-0.222578,1447
1934,0.212241,1446
1935,0.342171,1431
1936,0.554566,1447
1937,0.241235,1447
1938,0.0766342,1447
1939,0.302429,1447
1940,0.448511,1447
1941,0.462061,1447
1942,-0.399064,1447
1943,0.165788,1447
1944,0.0777853,1457
1945,-0.180745,1457
1946,-0.103342,1480
1947,-0.0736974,1480
1948,0.0783673,1480
1949,-0.0610304,1480
1950,-0.358653,1471
1951,0.11277,1480
1952,0.103255,1471
1953,-0.347156,1471
1954,-0.246537,1471
1955,-0.253453,1575
1956,-0.203925,1595
1957,-0.206983,2011
1958,0.308832,2011
1959,0.182867,2011
1960,0.107453,2011
1961,-0.0303218,2011
1962,-0.481333,2011
1963,0.211331,2011
1964,0.0356378,2011
1965,-0.237259,2011
1966,0.364132,2011
1967,-0.108842,2011
1968,-0.0810562,2011
1969,-0.00575856,1961
1970,0.125986,1961
1971,-0.105451,1961
1972,-0.291881,1961
1973,-0.00964443,1961
1974,0.0863424,1961
1975,-0.0823629,1961
1976,-0.0506939,1965
1977,0.451374,1965
1978,0.191255,1965
1979,0.147933,1965
1980,0.277726,1961
1981,0.301937,1965
1982,0.409509,1965
1983,0.31573,1965
1984,0.537466,1965
1985,0.188919,1965
1986,0.0438745,1965
1987,0.781662,1965
1988,0.256362,1965
1989,0.585944,1965
1990,0.283406,2011
1991,0.412982,1975
1992,-0.58996,1975
1993,0.197429,1975
1994,0.446669,2011
1995,0.549189,2011
1996,0.38632,1975
1997,0.589077,2011
1998,1.23917,2011
1999,0.489527,1975
2000,0.295425,2011
2001,0.79283,1975
2002,0.875141,1975
2003,0.92983,1975
2004,0.0723614,1975
2005,0.810864,1975
2006,1.26926,1975
2007,0.902553,2011
2008,1.00251,1975
2009,0.820595,2011
2010,0.733574,2011
2011,1.21999,1975
2012,0.992684,2011
2013,0.684484,2011
2014,0.669655,2011
2015,1.03875,2011
2016,1.25747,2011
2017,1.06262,2011
2018,1.05681,2011
2019,1.18962,2011
2020,1.32258,2011
2021,1.18797,2011
2022,1.71806,2011
2023,1.92684,2011