1901,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1902,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1903,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1904,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1905,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1906,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1907,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1908,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1909,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1910,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1911,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1912,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1913,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1914,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1915,21,21,21.3,21.4,21.8,21.4,21.4,21.6,21.3,21.5,21,21.3
1916,21.1,21,21.3,21.8,21.6,21.2,21.1,20.9,21.2,20.8,20.7,20.7
1917,20.7,20.4,21.2,21.4,21.2,20.6,20.8,20.8,20.9,20.8,20.7,20.9
1918,20.9,20.8,20.6,21.1,20.6,20.4,20.8,21.1,20.9,21,20.6,20.9
1919,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1920,21,21,21.3,21.4,21.2,20.9,20.8,20.9,20.9,20.8,20.7,20.9
1921,21,20.9,20.7,21,20.8,20.6,20.8,20.6,20.9,20.3,20.5,20.8
1922,20.9,20.7,20.8,21.3,20.9,20.4,20.5,20.8,20.8,20.5,20.3,20.6
1923,20.5,20.9,21.2,21.1,20.7,21,20,20.7,21,20.5,20.8,20.6
1924,21.7,21,21.7,21.6,21.4,20.6,20.5,20.9,20.2,20.4,20.3,20.7
1925,20.3,20.1,20.5,21.1,21.2,20.6,20.6,20.6,20.9,21,20.5,20.9
1926,21.3,21.3,21.8,22.1,21.6,21.3,20.9,20.9,20.8,20.8,20.8,20.5
1927,20.6,20.7,21.2,21.3,21.1,20.8,20.2,21,20.9,20.5,21,21.2
1928,21,21.2,21,21.5,21.1,20.8,20.7,20.8,20.9,20.7,20.7,20.6
1929,21.3,21.1,21,21.5,21,20.7,20.2,20.9,21,20.8,20.8,21.2
1930,20.1,20.9,21.1,21.5,21,20.4,20.4,20.3,20.3,20.9,21.2,21
1931,21.4,21.7,21.9,21.9,21.9,21.5,21,20.7,21.3,20.8,20.4,21.5
1932,21.9,21.7,21.3,22.5,21.6,21.2,20.3,21.4,20.9,20.9,20.8,21.1
1933,22.3,21.3,21.5,21.5,21.7,21,21.4,19.9,20.4,19.8,20.3,20.3
1934,20.2,20,20,20.7,20.2,21,20.1,20.4,21.3,20.1,20.3,20.8
1935,20.4,20.2,21.4,20.8,20.8,20.7,20.2,20.8,19.7,20.7,20.4,21.1
1936,21.3,20.8,22,21.2,21.2,20.2,20,19.8,20.4,20.3,21.3,20.4
1937,20.7,21.1,21.7,21.1,20.6,20.9,20.9,21,20.6,20.2,20.7,20.9
1938,20.8,20.9,20.8,21.2,21,20.5,20.4,20.6,20.3,20.6,20.1,20.4
1939,20.1,20.7,21.1,20.9,20.9,20.9,20.2,21.3,21.3,20.4,20.8,21.4
1940,17.9,18.8,18.4,21.9,21.2,20.5,21,21.4,20.6,20.6,20.2,18.2
1941,21.6,21.9,22.8,22.7,22.5,22.6,22.1,22.2,22.2,21.6,20.9,21
1942,20.5,21,21.4,21.6,21.2,20.6,20.1,21,21.2,20.8,20.7,20.6
1943,20.5,20.4,19.6,21,21.3,20.6,21.3,20.4,21.3,20.7,20.8,21
1944,21.5,21.4,21.7,22.2,21,20.6,21.1,21,21.2,21.6,21.5,21.3
1945,21.8,21.6,22.2,21.3,20.9,21.5,20.9,21.3,21,20.6,20.6,20.7
1946,20.9,21.5,21.3,21.9,21.7,21.1,20.8,20.9,21,20.7,20.8,21.2
1947,21.2,21.6,21.6,21.3,20.8,21.2,20.9,20.1,20.6,20.7,20.6,19.9
1948,20.1,19.7,21.4,21.1,21.7,20.8,19.9,19.6,21.2,21.9,21.4,21.3
1949,19.9,20.8,21.5,21.2,20.7,20,19.3,20.3,20.1,20.9,20.4,19.3
1950,19.5,19.8,19.9,21.3,20.8,20.6,20.2,19.9,20,20.4,20.4,20.6
1951,20.2,20.2,20.6,21.7,21.9,21.6,20.3,20.9,21.5,20.9,20.6,20.9
1952,21,21.1,21.1,21.4,21.4,20.9,20.2,20.9,20.8,20.4,20.5,20
1953,20.2,19.9,19.9,21.3,20.9,21,21.3,21.4,20.6,21.3,21,21
1954,20.5,20.8,21,20.7,20.3,19.3,18.9,19,19.9,19.6,20.1,19.9
1955,19.5,20.1,20.3,19.7,20.6,19.6,20,20.6,20,19.2,20.1,19.9
1956,19.2,20.5,21.5,21.5,20.8,20.9,19.8,21.1,20.5,21.1,20.2,20.4
1957,20.5,21.2,20.3,20.9,21.1,20.6,21.1,21.1,20.8,20.9,21.5,20.5
1958,21.4,21.8,22.1,22.4,21.8,21.4,21.3,21,21,20.5,20.5,20.9
1959,20.8,20.7,21.2,21.2,21,20.6,20.8,20.1,20.8,20.2,20,20.9
1960,20.4,20.9,20.6,20.8,21.1,20.8,20.2,20.1,20.3,20.5,20,19.9
1961,20.2,19.9,20.7,20.8,20.8,19.7,19.5,21,19.7,20,20.2,20.1
1962,20.3,21.1,21,21.6,20.9,20.2,20.4,20.3,20.4,20,20.3,20.3
1963,20.1,20,20.7,21.1,21.4,21.4,21,21.3,21.5,20.5,20.4,21.7
1964,21,20.8,21.6,21.5,21.6,20.2,20.1,19.9,20.7,20.1,19.8,19.7
1965,20.4,20.6,20.7,20.5,21.2,20.6,21,20.6,21,21,20.9,20.7
1966,21.5,21.3,21.1,21.4,20.8,21,21,20.4,21,20.7,20.6,20.7
1967,20.7,21,20.4,20.7,20.8,20.6,20.3,20.4,20.1,21,20.3,20.8
1968,20.3,20.2,20.3,20.8,20.4,20.4,20.7,21,20.5,20.4,20,20.4
1969,20.5,21.3,21.8,21.3,21.3,20.7,20.5,20.7,21,20,20.7,21.2
1970,21.3,21,21.1,21.7,21,21,20.7,20.7,20.9,20.6,20.2,21.3
1971,20.8,20.7,20.7,20.9,21,20.7,20.4,20.2,20.5,20.4,20.1,20.9
1972,21,21.3,21.1,21.5,21.5,21.4,21.4,20.5,21.1,20.9,20.7,21.3
1973,22.3,21.6,22.4,21.7,21.5,21.4,21,20.8,20.7,21.1,21,20.4
1974,20.9,20.8,20.9,20.9,20.7,20.8,20.4,20.6,20.2,20.7,21,20.3
1975,21.1,20.3,20.5,20.7,20.8,20.4,19.7,21.2,20.4,20.7,20.3,20.2
1976,20.6,20.6,20.8,20.9,20.8,20.3,20.1,20.4,21.2,20.9,20.7,20.9
1977,20.9,21.3,21.8,21.1,21.5,20.7,20.9,20.8,20.9,21.2,20.9,21.4
1978,20.9,21.6,21.5,21.3,21.3,20.8,21,20.6,21,21.2,21.4,21.4
1979,20.9,21.7,21.8,21.9,21.5,21.4,21,21.3,21,21.6,20.9,21
1980,21.3,21.3,21.9,21.8,22,21.3,21.2,20.7,21.5,21.5,20.8,21.1
1981,21.1,21.7,21.7,21.7,21.3,21.1,20.9,20.6,21,21,20.9,21.5
1982,21.1,21.7,21.3,21.5,21.4,21.6,21.6,21.8,21.4,21,21.2,21.8
1983,22.7,23,22.3,22.3,22.6,21.9,22,21.7,21.7,21.3,21.3,20.8
1984,20.3,21.2,21.5,21.6,20.9,21.3,21.2,21,20.6,21.2,20.6,21.6
1985,21.2,21.1,21.8,21.7,21.2,21.3,20.8,21.2,21,20.9,20.9,20.5
1986,21.5,20.3,20.6,21.1,20.8,20.4,20.2,21.5,20.7,19.9,20,20.5
1987,20.4,19.7,21.8,21.6,20,20.2,21.9,21.6,21.6,22,21.9,22
1988,22.3,22.2,22.5,22.3,22.4,21,21.5,20.1,21.5,21.6,21,21.6
1989,21.1,20.6,20.6,22.1,21.5,21.6,21.8,21.2,21.3,21.5,22,21.6
1990,21.8,21.4,22.3,22.6,22.3,22.1,21.5,22,21.9,21.4,21.4,21.5
1991,20.9,21.4,21.4,21,21.7,21.5,21.3,21.2,21.4,20.9,20.8,21.8
1992,21.4,21.8,21.8,22.1,21.5,22,21.7,22,21.2,21.1,21.2,21.9
1993,21.7,21.3,20.6,21.4,21.5,21.7,21.5,21.2,21.1,21.6,20.8,21.3
1994,20.8,20.8,20.8,21.5,21.3,21.4,21.3,21.3,21.8,21.4,20.9,21.3
1995,21.6,21.5,21.8,21.8,21.4,21.3,20.9,20.7,21.7,21.2,20.7,20.9
1996,20.7,21.5,21.1,21.7,20.7,20.1,21.5,21.4,20.9,21.8,21.8,21.3
1997,21.5,22,22.1,22.2,22.2,21.5,21.2,21.2,22.4,23.2,22.1,23
1998,24.3,22.3,23.5,22.6,22.6,22.1,21.4,21.8,21.4,22,21.5,22
1999,21.4,21,20.4,20.8,20.5,20.1,20.3,20.2,19.7,20,20.1,20.5
2000,20,20,20.2,20.6,20.4,20.3,19.8,20.6,20,20.8,20.6,20.6
2001,20.1,20.5,20.5,21.3,21,20.8,20.5,21.7,20.7,21.4,20.8,21
2002,21.2,21.2,20.9,21,21.3,20.6,21,21.7,21.6,22.6,22.1,22.8
2003,22.4,22.2,22,22.3,22.1,21.1,21.5,20.8,21.9,22,21.6,21.7
2004,22.5,22.5,23.2,22.5,21.2,22,20.2,22.1,21,21.4,21.4,22.1
2005,22,22.3,23.1,23.1,21.9,22,20.9,21.4,21.6,21.9,21.3,21.9
2006,21.7,20.9,22,22.5,22.4,21.6,22.3,21.9,21.8,22.6,21.1,22.1
2007,22.3,21.8,22.3,21.9,22,21.8,20.7,20.8,21.4,21.2,20.3,21.5
2008,21,20.8,21,21,20.8,20.9,20.3,20.1,20.8,21,21,21.3
2009,21.2,20.8,20.6,21.7,21.5,21.2,21.3,21.6,22.1,21.5,22,21.7
