1901,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1902,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1903,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1904,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1905,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1906,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1907,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1908,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1909,21,21.6,22,22.1,21.6,21.2,20.8,21,21.1,21.5,21.5,21.2
1910,21.1,21.6,22,22,21.6,21.3,20.9,21,21.2,21.5,21.5,21.2
1911,21,21.7,22.1,22.1,21.6,21.2,20.8,21,21.2,21.6,21.6,21.3
1912,21,21.6,22.2,22.2,21.6,21.3,20.8,21.1,21.1,21.6,21.7,21.2
1913,21,21.8,22.1,22.2,21.6,21.3,20.9,20.9,21.1,21.5,21.6,21.3
1914,21.2,21.7,22.1,22.2,21.7,21.3,21,21,21.2,21.6,21.6,21.4
1915,21.1,21.7,22.2,22.2,22.7,21.8,21.5,22,21.5,22.5,21.7,21.7
1916,21.2,21.6,22.1,22.7,22.1,21.3,21.2,21,21.5,21.4,21.4,20.8
1917,20.5,20.8,21.7,21.8,21.2,20.6,20.8,20.6,20.8,21.2,21.3,20.8
1918,20.5,21.2,21.4,21.7,20.8,20.7,20.7,21.1,21.1,21.9,21.5,21.2
1919,21,21.7,22.1,22,21.6,21.3,20.8,20.9,21,21.4,21.6,21.2
1920,21,21.6,22,22.1,21.6,21.2,20.8,20.9,21.1,21.6,21.5,21.1
1921,20.9,21.3,21.1,21.4,20.9,20.7,20.3,20.4,20.9,20.9,21.1,21.1
1922,20.8,21.3,21.5,21.7,21,20.7,20.6,20.7,21,21.5,21.2,20.4
1923,20.1,21,21.1,21.4,21,20.9,20,20.8,21,21.4,21.5,20.6
1924,21.4,21.6,22.3,22.3,21.6,20.6,20.4,20.5,20.2,20.6,21,20.5
1925,19.9,20.6,21.1,21.7,21.6,21,20.7,20.6,20.8,21.8,21.3,21.4
1926,21.2,21.9,22.4,22.4,21.8,21.8,20.6,20.9,20.8,21,21.4,20.4
1927,20.2,20.6,21.4,21.3,20.9,20.6,19.9,20.3,20.6,20.7,21.4,21.3
1928,20.7,21.2,21.3,21.7,21.1,20.9,20.2,20.5,20.6,21.1,21.2,20.5
1929,20.5,21.2,21.1,21.5,20.8,20.8,20,20.8,20.9,21.4,21.1,20.5
1930,20.6,21.3,22.1,22,21.4,21,20.5,20.7,20.8,21.2,21.7,21.3
1931,21.5,22,22.4,22.6,21.8,21.4,20.5,21,21,21.6,21.4,20.9
1932,20.8,21.6,21.6,22.2,21.3,21,20.6,21,20.9,21.2,21.7,21
1933,20.6,20.8,21.4,21.9,21.4,20.7,20.4,20.8,21.1,20.6,20.5,20.2
1934,20.2,20.2,20.8,21.6,21.4,21.3,20.4,20.9,20.9,20.5,21.2,20.9
1935,20.9,21.1,21.5,21.8,20.8,20.6,20.7,20.4,20.8,21.4,21.3,21.3
1936,20.4,21.4,21.6,21.5,21.5,21,20.6,20.9,21,21.1,21.7,21.1
1937,20.5,21.1,21.9,21.8,21.3,21.1,20.9,20.9,21.2,21.5,22,21.9
1938,21.5,22,21.1,21.2,21,21,21.3,20.7,21.2,21.9,21.5,21.3
1939,20.2,20.3,20.7,20.9,21.5,21.2,21,20.9,20.8,21.9,22.2,22.2
1940,21.3,22,22.3,22.1,22.3,21.7,21.3,20.4,21.1,21.8,22.3,20.2
1941,21.1,22.2,22.6,22.9,21.9,21,21.1,21.4,21.1,21.9,21.9,21.7
1942,21.7,22.2,23,22.4,21,20.7,20.4,21.1,21.1,21.8,21.7,21.4
1943,21,20.7,20.9,21.1,20.8,20.8,20.8,20.6,20.9,21.6,21.6,21.5
1944,20.9,20.8,21.2,21.6,21.1,20.9,21.1,21.2,20.5,21.9,21.7,21.3
1945,20.9,21.3,21.6,22.2,21.3,21.1,21.1,21.8,21.8,21.8,21.6,21.6
1946,20.8,21.1,21.7,21.3,21.2,21.6,20.9,20.9,21.2,21.6,21.6,21.6
1947,20.9,21.8,21.9,22.1,22,21.6,21,20.9,21,21.6,21.7,21.7
1948,20.8,21.4,21.6,21.6,21.4,21,20.9,20.7,21,21.8,21.9,21.6
1949,20.6,21,21.7,21.4,20.8,20.4,20.2,20.6,20.4,21.1,20.9,21.2
1950,20,20.7,21.1,21.4,20.7,20.8,20.4,20.4,20.8,21.1,21.6,21.1
1951,20.3,20.8,21.3,21.7,21.6,20.9,20.6,20.9,21.4,21.9,21.9,21.7
1952,20.9,21.3,22.4,21.5,21.5,21.4,20.7,20.6,20.4,21.6,21.7,21.4
1953,20.8,20.9,21.5,21.8,21.2,21.1,20.6,21,20.9,21.6,21.7,21.4
1954,20.6,21,21.5,21.7,21.3,20.9,20.5,20.4,20.9,20.9,21.3,20.8
1955,20.3,20.6,20.6,21.1,21.3,20.8,20.4,20.5,20.4,21.4,20.8,20.7
1956,20.8,21,21.4,21.6,21,20.5,20.5,19.8,20.3,20.7,21,20.9
1957,19.8,21.4,21.5,21.9,21.4,21,20.6,20.8,21.1,21.4,21.1,21.2
1958,21.4,21.5,22.2,22.6,21.9,21.6,21.4,21.2,21.8,21.6,21.1,21.7
1959,21.5,21.2,21.9,22.7,21.2,20.6,21,21,20.6,20.9,21.1,21.3
1960,20.7,20.9,21.6,21.3,20.7,20,19.6,21.2,20.6,21.6,21.5,21.6
1961,21.7,21.9,22.4,22.3,22,20.9,20.8,21,21.4,22.1,22.3,21.2
1962,21.2,22.2,21.7,23,21.7,21,20.3,21.5,21.4,22,22.1,22.1
1963,21.3,21.7,22.4,22,21.6,21.7,21.6,21.5,21.6,21.9,21.8,21.7
1964,22.1,22.6,22.8,22.1,21.6,21.1,20.8,21.2,20.9,20.6,20.7,20.5
1965,21.3,21.8,22.9,22.9,21.5,21.6,21.4,20.9,22.1,22.1,21.9,21.9
1966,21.9,22.5,22.1,23,22.3,22.2,21.1,21.3,21.5,22.1,21.9,21.4
1967,20.9,21.9,22.6,21.9,21.9,21,21.4,21.2,21.1,21.5,22.2,21.1
1968,21.1,22.2,21.9,21.4,20.3,21,20.7,20.9,20.7,21.4,21.3,21.6
1969,21,21.5,22.1,22.6,22.2,22.1,21.7,21.1,21.1,21.4,21.8,21
1970,21.4,21.3,21.6,21.9,21.7,21.3,20.9,20.8,20.9,22.2,21.6,21.2
1971,20.7,20.9,21.2,21.5,21.3,20.9,21.2,20.8,20.3,21,21.1,20.8
1972,20.2,21.1,21.3,21.5,21.6,20.8,21.9,21,21.5,21.9,22.1,22.9
1973,22.3,23.1,22.4,21.3,20.8,21.2,20.9,21.1,20.4,23.8,21.3,20.7
1974,20.7,21.8,21.6,22,21.8,21.1,21.2,20.7,20.6,20.9,21.2,20.2
1975,20.4,20,21.6,22.2,21,21,20.7,20.7,20.8,20.3,21.2,21.9
1976,20.6,21.1,21.2,21.5,22,20.9,21.5,22.7,21.7,22.8,21.1,21.4
1977,22.1,21.9,22.3,23.1,21.5,21.1,21.5,21.4,21.3,21.5,21.5,20.9
1978,20.8,22.9,22.4,21.8,21.7,20.9,21.2,20.1,21.2,20.9,21.6,22
1979,20.9,21.8,21.4,21.8,21.5,21.1,20.9,21,21.7,21.5,21.9,21.3
1980,20.7,22.3,22,22.2,22.3,21.9,20.7,20.9,21.3,21.2,21.3,21.2
1981,21.2,21.3,22.1,22,21.8,21.6,20.5,20.6,20.8,21.4,21.5,20.9
1982,21.2,21.9,21.8,21.4,21.2,21,20,20.9,21.3,21.1,21.5,20.9
1983,21.8,22.2,22.2,21.9,22.3,21.1,20.4,21.3,21.4,21.2,21,20.1
1984,19.9,20.7,22.4,22.7,21.9,21.2,20.5,20.8,20.7,21.8,21.7,21.4
1985,21.9,21.2,22.4,22.4,21.3,20.1,19.5,20.2,20.4,20.8,20.4,20.3
1986,20.1,21.4,21.7,20.9,21.7,21.3,20.1,21.4,21.3,21.4,21.3,21
1987,21.3,21.6,22.4,22.5,22.2,21.7,22.2,21.3,22.1,22.7,22.3,22.2
1988,22,22.6,23.4,23.1,22.2,21.6,20.7,21.6,21.7,22.1,21,21.1
1989,20.1,20.5,21.2,21.7,20.2,19.8,19.1,20.2,20.3,21.8,20.2,19.5
1990,19.4,22.1,22.6,20.9,21.6,21.1,19.9,20.2,21.2,20.1,21,20.6
1991,21.1,21.9,22.1,22.1,21.6,20.9,19.4,19.3,20.5,20.4,20.8,20.8
1992,20.6,22,22.4,21.9,21,21.4,19.3,20.2,20.7,21,20.7,21.4
1993,20.4,21.2,20.3,20.9,20.7,20.6,19.9,21.7,21.1,22.5,21.5,21
1994,21.2,21.6,21.8,21.6,21.3,20.9,20.2,20.7,20.5,20.7,20.4,19.2
1995,20.7,21.8,22.1,22.6,21.7,21.7,20.5,20.4,21,21.1,21.1,21
1996,20.7,21.7,22.5,22.4,21.9,21,22.1,20.7,20.8,22,22.2,22
1997,21.1,21.6,22.4,22.8,21.6,21.8,21.6,21.6,21.1,22.2,21.2,20.4
1998,20.5,20.8,20.4,23.1,22.3,20.6,21.8,21.6,21.7,21.9,21.5,21.1
1999,21.8,21.6,21.6,21.4,21.8,21.6,21.2,20.4,20.6,21.8,22.4,22
2000,21.9,21.7,22.1,22.3,22.2,21.9,21.6,21.5,21.5,22,22.4,21.6
2001,21.6,21.5,22.1,22.7,22.4,21.5,21.6,21.8,21.7,22.3,22.6,21.8
2002,22.1,22.9,22,22.2,22.5,21.6,22,21.8,21.7,21.8,21.5,21.1
2003,22.9,23.2,22.8,22.9,22.4,22.2,21.5,22,21.7,22.2,22.4,21.8
2004,22.2,22.7,23,22.6,21.7,21.7,20.9,21.2,21.9,23,22.1,21.9
2005,22.9,22.8,23.5,22.6,22.7,22,21,21.7,21.8,22.1,22.9,21.8
2006,21.5,22.7,22.5,23.3,22.4,22.2,21.3,22.4,22.3,22.7,21.8,22.1
2007,23.2,23.6,22.7,22.8,22.7,22,21.8,21.6,21.5,21.8,22.3,21.7
2008,21.5,21.7,22.6,23.1,21.8,22,21.6,21.8,21.6,21.6,21.3,19.9
2009,20.6,21.7,21.5,22.9,21.3,21,20.6,21.2,21.6,22.8,22.3,21.6
