Year,Value,NumPoints 1851,-0.175793,1187 1852,-0.10292,1222 1853,-0.243708,1292 1854,-0.284209,1387 1855,-0.374772,1416 1856,-0.278247,1419 1857,-0.658612,1500 1858,-0.535638,1393 1859,-0.138369,1432 1860,-0.370593,1401 1861,-0.628858,865 1862,-0.343478,1129 1863,-0.379319,1101 1864,-0.323505,1026 1865,-0.365141,972 1866,-0.593764,931 1867,-0.61122,939 1868,-0.284539,1016 1869,-0.299886,1168 1870,-0.292131,1281 1871,-0.359489,1293 1872,-0.144952,1340 1873,-0.361112,1443 1874,-0.336756,1284 1875,-0.283894,1465 1876,-0.597803,1491 1877,-0.403361,1416 1878,-0.120167,1469 1879,-0.34229,1640 1880,-0.323869,1474 1881,-0.124819,1581 1882,-0.331524,1733 1883,-0.341983,1773 1884,-0.57053,1899 1885,-0.606325,1867 1886,-0.295586,1907 1887,-0.523879,1808 1888,-0.409052,1810 1889,-0.15817,1769 1890,-0.535965,1779 1891,-0.347347,1780 1892,-0.45807,1735 1893,-0.576662,1760 1894,-0.509912,1715 1895,-0.478403,1699 1896,-0.353727,1658 1897,-0.108209,1851 1898,-0.552804,1903 1899,-0.356275,1995 1900,-0.293371,1941 1901,-0.249448,1945 1902,-0.434554,2019 1903,-0.516097,2062 1904,-0.604907,2022 1905,-0.435093,2017 1906,-0.37352,2014 1907,-0.649047,2016 1908,-0.448518,2013 1909,-0.589135,2021 1910,-0.531924,2052 1911,-0.619993,2028 1912,-0.331143,2106 1913,-0.546688,2107 1914,-0.305242,2080 1915,-0.155901,1954 1916,-0.414096,1999 1917,-0.656822,1868 1918,-0.545241,1774 1919,-0.331704,1837 1920,-0.256097,1932 1921,-0.298153,1996 1922,-0.453834,2067 1923,-0.401593,2116 1924,-0.209513,2117 1925,-0.300052,2061 1926,-0.263546,2102 1927,-0.217974,2143 1928,-0.288187,2126 1929,-0.423398,2110 1930,-0.246271,2132 1931,-0.183291,2101 1932,-0.153901,2168 1933,-0.27369,2100 1934,-0.129296,2128 1935,-0.308761,2075 1936,-0.1597,2120 1937,-0.0730745,2116 1938,-0.0834247,2089 1939,-0.0269857,2143 1940,0.0577917,1993 1941,0.0657359,1860 1942,0.123269,1932 1943,0.0651249,1881 1944,0.147537,1832 1945,-0.0291079,1789 1946,-0.0719639,2020 1947,-0.0691665,2026 1948,0.0727486,2024 1949,-0.102384,2054 1950,-0.129787,2093 1951,0.0513016,2012 1952,0.0436244,2034 1953,0.162657,2067 1954,-0.162017,2079 1955,-0.226769,2060 1956,-0.337886,2258 1957,0.0243493,2415 1958,0.0166754,2446 1959,-0.0362531,2383 1960,-0.171561,2435 1961,0.0638689,2421 1962,-0.172615,2397 1963,-0.145296,2429 1964,-0.365339,2429 1965,-0.192961,2457 1966,-0.216596,2501 1967,0.0608176,2484 1968,-0.222075,2492 1969,0.0636435,2510 1970,-0.141025,2511 1971,-0.19917,2441 1972,-0.0871443,2482 1973,0.106387,2490 1974,-0.130467,2473 1975,0.0504647,2495 1976,-0.357411,2486 1977,0.227104,2495 1978,0.00854357,2488 1979,-0.0224911,2564 1980,0.245376,2568 1981,0.14786,2550 1982,0.0890974,2528 1983,0.218866,2540 1984,0.214048,2555 1985,0.0678106,2579 1986,0.130989,2585 1987,0.169486,2572 1988,0.319443,2558 1989,0.0392555,2551 1990,0.406363,2572 1991,0.314112,2580 1992,0.167544,2565 1993,0.196006,2516 1994,0.209119,2542 1995,0.26598,2558 1996,0.237869,2555 1997,0.317795,2569 1998,0.63931,2563 1999,0.248322,2572 2000,0.307212,2565 2001,0.490326,2550 2002,0.502602,2549 2003,0.522889,2577 2004,0.351686,2559 2005,0.554074,2575 2006,0.472605,2578 2007,0.580447,2579 2008,0.433038,2579 2009,0.550408,2578 2010,0.715516,2579 2011,0.44392,2579 2012,0.659965,2575 2013,0.557974,2564 2014,0.737774,2574 2015,0.732012,2575 2016,0.880843,2584 2017,0.780023,2582 2018,0.71339,2584 2019,0.777981,2575 2020,0.908519,2582 2021,0.707012,2582