Year,Value,NumPoints 1881,-2.24809,863 1882,0.0196042,917 1883,-0.0950679,1029 1884,-0.856035,1099 1885,0.134223,1122 1886,-2.04374,1249 1887,-1.45027,1122 1888,-2.33368,1104 1889,1.28032,1122 1890,-2.08414,1136 1891,-1.91499,990 1892,-1.54101,1071 1893,-1.26189,1189 1894,-1.75191,1290 1895,-1.32767,1366 1896,-1.32338,1247 1897,-2.74189,1402 1898,-3.18504,1342 1899,-2.38629,1357 1900,0.34736,1415 1901,1.16371,1345 1902,0.222868,1468 1903,0.98091,1468 1904,-2.09638,1447 1905,0.165823,1364 1906,-1.38606,1274 1907,-0.990226,1390 1908,1.36708,1449 1909,-0.288836,1418 1910,0.344482,1480 1911,-0.219527,1482 1912,-1.26789,1480 1913,-0.207855,1413 1914,-0.49909,1456 1915,-1.3942,1476 1916,0.36585,1536 1917,0.458131,1482 1918,-1.06989,1456 1919,-3.55523,1513 1920,1.98898,1392 1921,0.0422453,1495 1922,-2.90934,1535 1923,1.45135,1555 1924,-0.255731,1555 1925,-1.10449,1547 1926,-0.835501,1565 1927,1.28836,1582 1928,2.28028,1582 1929,2.33416,1602 1930,-1.49174,1578 1931,1.00284,2340 1932,1.0198,2340 1933,1.07082,2340 1934,3.48028,2340 1935,2.1113,1602 1936,-0.864926,1602 1937,1.55662,2340 1938,2.12756,2340 1939,0.703739,2340 1940,1.25105,2340 1941,1.15067,2340 1942,1.03755,2340 1943,2.38086,2340 1944,2.1146,1620 1945,1.70101,1620 1946,-1.82198,2340 1947,1.8073,2340 1948,-0.0209408,2340 1949,-0.3577,2340 1950,-0.589542,2340 1951,-1.11562,2340 1952,0.758049,2340 1953,1.172,2340 1954,-0.0651833,2340 1955,-1.55744,2340 1956,1.69869,2340 1957,0.460819,2340 1958,-0.316105,2340 1959,1.65667,2340 1960,-0.200785,2340 1961,-0.165508,2340 1962,1.1363,2340 1963,1.01596,2340 1964,1.48248,2340 1965,-0.694411,2340 1966,-2.13363,2340 1967,-1.5302,2340 1968,0.581923,2340 1969,-0.522527,2340 1970,-0.171605,2340 1971,0.182208,2340 1972,-0.218821,2340 1973,0.166205,2340 1974,-1.01575,2340 1975,1.4205,2340 1976,-0.310966,2340 1977,-0.798983,2340 1978,0.616896,2340 1979,-4.1487,2340 1980,2.61503,2340 1981,1.59267,2340 1982,1.17592,2340 1983,0.093122,2340 1984,0.0388571,2340 1985,-0.202486,2340 1986,2.28137,2340 1987,-1.17355,2340 1988,1.95432,2340 1989,3.06651,2340 1990,-0.300703,2340 1991,0.234133,2340 1992,0.50345,2340 1993,2.11568,2340 1994,0.145989,2340 1995,3.04617,2340 1996,2.36527,2340 1997,0.748294,2340 1998,-0.716655,2340 1999,0.730647,2340 2000,2.8208,2340 2001,1.4211,2340 2002,-0.408501,2340 2003,0.94698,2340 2004,0.251895,2340 2005,3.00576,2340 2006,3.28683,2340 2007,1.39889,2340 2008,2.08715,2340 2009,0.132186,2340 2010,2.39547,2340 2011,1.67106,2340 2012,3.89609,2340 2013,0.641389,2340 2014,3.71708,2340 2015,2.51694,2340 2016,4.85537,2340 2017,3.67361,2340 2018,4.50667,2340 2019,3.35278,2340 2020,2.71727,2340