Year,Value,NumPoints 1855,20.7908,27 1856,20.8289,27 1857,20.2215,27 1858,19.5752,27 1859,20.1525,27 1860,19.5509,27 1861,21.3395,27 1862,20.104,27 1863,20.735,27 1864,20.342,27 1865,21.0308,27 1866,20.4421,27 1867,20.6889,27 1868,20.7317,27 1869,20.3382,27 1870,19.0625,27 1871,20.5851,27 1872,21.1092,27 1873,20.7227,27 1874,20.4584,27 1875,19.6838,27 1876,21.0569,27 1877,21.5318,27 1878,20.7439,27 1879,19.8353,27 1880,20.7213,27 1881,20.1871,27 1882,20.5774,27 1883,19.3308,27 1884,19.409,27 1885,20.468,27 1886,19.7233,27 1887,20.1331,27 1888,19.9208,27 1889,19.7535,27 1890,19.6021,27 1891,19.7897,27 1892,19.8661,27 1893,19.7085,27 1894,20.1623,27 1895,19.8969,27 1896,20.2758,27 1897,20.3718,27 1898,20.7921,27 1899,20.6793,27 1900,20.4392,27 1901,20.1769,27 1902,20.1615,27 1903,18.5886,27 1904,19.5757,27 1905,18.8191,27 1906,19.987,27 1907,19.1701,27 1908,19.8706,27 1909,19.2425,27 1910,19.3562,27 1911,19.5064,27 1912,19.0261,27 1913,19.5273,27 1914,19.2513,27 1915,20.1392,27 1916,19.588,27 1917,19.9794,27 1918,19.4043,27 1919,19.2409,27 1920,19.1532,27 1921,19.3969,27 1922,19.2507,27 1923,19.1185,27 1924,19.7005,27 1925,19.8177,27 1926,19.9304,27 1927,19.7617,27 1928,20.0196,27 1929,19.6317,27 1930,20.0798,27 1931,20.3761,27 1932,20.8339,27 1933,20.2531,27 1934,20.2061,27 1935,20.5656,27 1936,20.4929,27 1937,20.6988,27 1938,20.7698,27 1939,20.5113,27 1940,20.3942,27 1941,20.7655,27 1942,20.9293,27 1943,20.8169,27 1944,20.6728,27 1945,20.218,27 1946,20.7618,27 1947,20.7372,27 1948,20.4889,27 1949,20.9176,27 1950,19.9228,27 1951,20.9573,27 1952,21.1981,27 1953,20.5382,27 1954,20.4651,27 1955,20.8279,27 1956,20.4535,27 1957,20.826,27 1958,21.2134,27 1959,20.8035,27 1960,20.8166,27 1961,20.7883,27 1962,20.262,27 1963,20.4488,27 1964,19.6701,27 1965,20.1806,27 1966,20.1092,27 1967,20.0516,27 1968,19.9258,27 1969,20.6939,27 1970,20.3392,27 1971,20.507,27 1972,19.8333,27 1973,20.48,27 1974,20.3494,27 1975,20.3206,27 1976,20.0326,27 1977,19.9556,27 1978,20.5825,27 1979,20.3208,27 1980,20.8445,27 1981,20.5316,27 1982,19.9026,27 1983,21.4215,27 1984,20.8669,27 1985,20.3809,27 1986,20.1663,27 1987,20.8882,27 1988,20.8715,27 1989,20.5308,27 1990,21.0505,27 1991,20.5051,27 1992,19.9918,27 1993,20.8777,27 1994,20.0173,27 1995,21.0941,27 1996,20.001,27 1997,20.6144,27 1998,21.5804,27 1999,21.0915,27 2000,20.6882,27 2001,20.6282,27 2002,20.9092,27 2003,21.0744,27 2004,20.5776,27 2005,21.6692,27 2006,21.6704,27 2007,21.2869,27 2008,20.8942,27 2009,20.8751,27 2010,21.4415,27 2011,21.6267,27 2012,21.6086,27 2013,20.615,27 2014,21.1989,27 2015,21.5891,27 2016,22.0749,27 2017,21.2353,27 2018,21.867,27 2019,21.7784,27