Year,Value,NumPoints 1855,4.60655,20 1856,4.77525,20 1857,4.97683,20 1858,5.21087,20 1859,5.27553,20 1860,4.89232,20 1861,4.75458,20 1862,4.74787,20 1863,4.9844,20 1864,4.81047,20 1865,4.74675,20 1866,4.19235,20 1867,4.91077,20 1868,4.69981,20 1869,4.71411,20 1870,4.82485,20 1871,4.59011,20 1872,4.49081,20 1873,3.7432,20 1874,4.39912,20 1875,4.30028,20 1876,4.50465,20 1877,5.09574,20 1878,5.1517,20 1879,4.42271,20 1880,5.33969,20 1881,4.21638,20 1882,4.37244,20 1883,4.06574,20 1884,5.76206,20 1885,5.98187,20 1886,3.2286,20 1887,3.62053,20 1888,4.3087,20 1889,5.0746,20 1890,4.08925,20 1891,3.74147,20 1892,4.13789,20 1893,3.59961,20 1894,4.17244,20 1895,4.16123,20 1896,4.76337,20 1897,4.07007,20 1898,4.69588,20 1899,5.22035,20 1900,4.44764,20 1901,4.77788,20 1902,3.86173,20 1903,4.97798,20 1904,3.70832,20 1905,4.48347,20 1906,4.24076,20 1907,3.61773,20 1908,3.50326,20 1909,2.97242,20 1910,3.85111,20 1911,2.81298,20 1912,3.86071,20 1913,5.39922,20 1914,3.79196,20 1915,5.14357,20 1916,3.82372,20 1917,3.48762,20 1918,3.63535,20 1919,2.81128,20 1920,3.1817,20 1921,3.11683,20 1922,4.12051,20 1923,4.22085,20 1924,3.99449,20 1925,3.51086,20 1926,4.76987,20 1927,5.49825,20 1928,4.32769,20 1929,5.01735,20 1930,5.24912,20 1931,4.34607,20 1932,4.27636,20 1933,5.01526,20 1934,3.39745,20 1935,4.44488,20 1936,4.8163,20 1937,5.23586,20 1938,4.65671,20 1939,3.9642,20 1940,3.89439,20 1941,4.97853,20 1942,5.60857,20 1943,3.61235,20 1944,4.80566,20 1945,5.26685,20 1946,4.44456,20 1947,4.0225,20 1948,3.37881,20 1949,3.70009,20 1950,4.21537,20 1951,4.16652,20 1952,4.2621,20 1953,4.04113,20 1954,4.1042,20 1955,4.65434,20 1956,4.13773,20 1957,4.15569,20 1958,4.87263,20 1959,5.0277,20 1960,4.47738,20 1961,4.42641,20 1962,4.22016,20 1963,4.84038,20 1964,5.17816,20 1965,3.6044,20 1966,4.20903,20 1967,4.21404,20 1968,4.35275,20 1969,4.17964,20 1970,4.85165,20 1971,4.46975,20 1972,3.62123,20 1973,3.93127,20 1974,4.25896,20 1975,4.49532,20 1976,3.96348,20 1977,4.84598,20 1978,4.38125,20 1979,5.11137,20 1980,4.46,20 1981,4.46147,20 1982,4.62144,20 1983,4.51537,20 1984,5.41082,20 1985,5.4264,20 1986,4.93064,20 1987,5.38305,20 1988,4.81251,20 1989,4.3997,20 1990,4.75311,20 1991,4.80559,20 1992,4.89562,20 1993,4.58083,20 1994,5.3183,20 1995,4.60485,20 1996,4.71604,20 1997,4.46836,20 1998,4.63446,20 1999,5.0689,20 2000,4.13162,20 2001,5.03541,20 2002,4.27456,20 2003,5.45008,20 2004,4.46717,20 2005,4.89537,20 2006,4.77469,20 2007,4.14878,20 2008,4.05326,20 2009,3.86011,20 2010,4.79403,20 2011,4.46567,20 2012,3.84123,20 2013,4.34424,20 2014,5.30808,20 2015,5.97863,20 2016,5.73961,20 2017,5.40483,20 2018,5.20338,20 2019,5.51297,20 2020,5.12888,20 2021,5.10363,20 2022,4.12393,20