1901,19.8,21.4,21.6,21.5,21.8,21.7,21,21,21.4,21.4,21.4,21.2
1902,21.2,21.1,21.4,21.6,21.9,22,21.2,21.2,21,21.3,21.2,20.8
1903,20.5,21.4,21.9,21.7,22,21.8,20.9,20.7,21.1,21.2,21.3,21.1
1904,20.1,21.2,21.4,21.3,21.7,21.8,20.8,21,21.3,21.2,21.4,20.9
1905,20.3,21,21.5,21.7,22,21.4,20.9,20.8,20.9,21.5,21.4,21
1906,19.9,21.7,22.2,22.4,21.8,21.6,20.7,20.8,21,21.2,21.5,20.7
1907,20.7,21.2,21.6,21.5,22,21.6,21.1,21,21.1,21.3,21.2,20.8
1908,20.7,21.3,21.6,21.9,21.6,21.6,20.8,20.6,20.9,21.2,21.2,20.8
1909,20.2,21.6,22,21.5,21.6,21.2,20.6,20.6,21.2,21.3,21.1,20.7
1910,19.2,21.6,21.9,22,21.9,22.4,21,21,21.2,21.3,21.3,21.1
1911,20.6,21.4,21.9,21.8,21.7,21.1,20.9,20.6,21.1,21.2,21.1,20.6
1912,21.1,21.5,22,22.2,22.4,21.9,21.1,21,21,21.4,21.3,21
1913,21.3,21.4,21,21.6,22,22.6,21.3,21.3,21.2,21.2,21.2,20.5
1914,20.8,21.2,21.4,21.5,22.2,22.3,20.8,20.7,20.9,21.4,21.2,20.8
1915,20.4,21.5,22,22,21.8,21.9,21,21,21.5,21.7,21.6,21.1
1916,20.5,21.5,22,21.8,22,21.8,20.8,20.9,21.1,21.3,21.3,20.5
1917,20.5,20.9,21.7,21.7,21.6,21.5,21.2,20.9,20.9,21.3,20.9,20.6
1918,19.9,21.6,21.8,21.3,21.8,21.4,20.6,20.4,21.3,21.3,21.4,20.4
1919,20.4,21.4,21.1,21,21.2,21.2,20.3,20.7,20.7,21,21.6,20.9
1920,20.2,21.3,21.3,21.3,21.7,21.5,20.6,20.7,20.9,21.1,21,20.8
1921,20.4,21.3,21.5,21.1,21,20.8,20.8,20.8,21,21.5,21.1,20.5
1922,20.4,21.5,22,21.3,21.8,21.7,21,20.6,21,20.9,20.9,20.4
1923,20.7,20.4,21.1,21,21.4,21.6,21.7,20.6,21,21,21.1,21
1924,20.3,21.5,21.8,20.5,21.4,21.1,20.6,20.7,21.8,20.9,20.7,19.5
1925,18.2,20.3,20.9,22.1,22.8,22.2,20.8,20.4,20.3,20.6,19.7,19.4
1926,19.9,22.4,22.5,22.4,21.6,20.2,19.9,21.4,21.7,21.9,21,20.9
1927,19.3,21.4,20.5,21.4,21.3,21.1,20.4,20.6,21.6,20.4,20.6,20.1
1928,19.9,20.4,20.9,19.8,20.5,21.3,20.7,19.9,20.4,19.9,20.3,20.5
1929,18.9,19.7,21.1,21.6,21.3,20.3,20.3,20.2,20.7,20.7,20.4,19.7
1930,19.4,20.1,20.5,20.9,21.5,20.4,20.3,20,20.8,20.5,20.4,20.8
1931,20.2,20.8,21.6,21.4,21.3,21.6,20.6,20.3,20.3,20.8,20.5,20.5
1932,18.9,20.8,21.7,21.3,21.6,21.6,20.3,20.9,21.2,21.3,20.9,19.5
1933,20.1,19.9,20.3,21.2,22,21.1,21.1,21.3,21,20.6,21,21.2
1934,18.6,19.9,21.2,21.6,21.4,21.1,21,21.7,22.1,21.4,21.3,20.2
1935,19.4,20.2,20.9,21.2,21.2,20.9,20.4,20.5,20.9,20.7,20.5,20.6
1936,19.9,21.5,21.7,20.9,21.1,21,20.3,20.4,20.8,21.1,21.3,20.8
1937,19.9,21.2,21.5,21.7,21.8,21.8,20.6,20.7,20.8,20.9,21.2,20.5
1938,20.3,20.9,21.6,21.5,21.7,21.6,20.8,20.4,20.9,21.5,21.2,21.1
1939,20.5,20.5,21.6,21,21.6,21.8,21.1,20.9,21.1,21.1,21.1,20.6
1940,20,20.7,21.2,21.6,22,21.8,21,20.9,21.3,21.2,21.1,20.3
1941,21.4,21.3,21.8,21.9,22.6,21.7,20.9,21.1,21.4,21.8,21.7,20.8
1942,19.5,21,21.8,22,22,21.5,20.8,19.9,21.4,21.6,21.6,19.8
1943,19.4,20.4,21.9,22,22.2,21.5,20.8,20.1,21.4,21.5,21.3,20.1
1944,19.7,20.8,21.2,22.3,22.3,21.6,21.4,21.3,21,21.3,21.5,21.1
1945,20.9,20.7,21.9,22,22.2,22.2,20.9,21,21,21.2,21.2,20.6
1946,20.2,20.9,21.9,21.7,21.9,21.3,20.8,20.5,20.3,21,21.9,21.2
1947,20.4,20.8,21.7,21.9,22.5,21,21.3,20.8,20.9,21.1,20.6,20.6
1948,19.4,20.2,21.9,21.1,22.1,21.5,20.9,20.9,20.8,21.3,21,21
1949,20.2,20.2,21.4,21.8,22.3,21.5,21.7,21.3,21.5,21.3,21.2,20.9
1950,20.2,20.5,21.6,22.1,22,21.4,21.1,20.8,20.5,20.5,21.4,20.8
1951,20.4,20.5,21.6,21.5,21.8,21.5,21.5,20.9,21.3,21,21.2,21.6
1952,20.9,21.4,21.5,21.5,22,21.5,21,20.6,20.6,21.2,21.2,21.2
1953,21.5,21.3,21.3,21.7,21.9,21.3,21.2,20.7,21.1,21.3,21.3,21
1954,20.8,21.2,21.2,21.1,21.6,21.3,20.3,20.3,21,20.9,21,21.2
1955,20.8,21.3,21.4,21.8,21.8,21.6,21.3,20.7,20.9,21.4,21,20.2
1956,20.2,21,21.3,21.9,21.6,21.6,20.2,20.6,21,21,21.1,20.5
1957,19.4,21.1,21.5,21.5,22.2,21.8,20.9,20.9,21.3,21.2,21.4,21.3
1958,21.2,21.4,21.9,21.6,21.9,21,20.2,20.4,20.9,21.7,22,20.7
1959,20.6,21.6,21.8,21.9,22.2,22.1,21.1,21.1,20.7,21.1,21.3,20.6
1960,20.7,21.4,21.2,20.8,22,21.4,21.3,21.1,21.3,21.6,21.7,21.3
1961,20.3,20.6,21.9,21.4,22,22.1,21,20.4,21,21.3,21.1,20.8
1962,20.7,21.2,21.2,22,21.6,21.1,21.4,21.4,21,21.4,20.9,20.4
1963,20.1,21.3,21.3,22.2,21.2,21.4,21,21.7,22.1,20.9,21,20.8
1964,20.1,21.4,22,22,21.8,21.8,21.1,20.7,21,21,21.3,20.8
1965,19.5,21.1,21.8,21.5,21.8,21.8,21,20.5,20.9,21.6,21.3,20.8
1966,20.4,21.5,21.9,22,22.4,21.4,21.7,21.2,21.2,21.6,21.4,21.1
1967,19.7,20.8,21.6,21.8,22.1,21.5,20.6,20.7,20.9,21.2,21.6,20.7
1968,20.2,21.1,21.3,21.5,21.9,21.6,21.7,21.8,21.7,21,21.1,21
1969,21,22.2,22,22.1,21.6,22.1,21.1,20.9,21.5,21.6,21.2,21.3
1970,21.2,21.9,22.1,22.2,22.3,22.2,21,21.3,21,21.5,21.4,20.7
1971,20,20.7,21.3,20.6,21.2,21,20.1,20.3,20.4,20.7,20.4,19.4
1972,19.7,19.8,20.5,20.9,21.7,21.1,21.4,20.5,21,21.1,21.2,20.6
1973,20,21.3,21.7,21.4,21.8,21.5,21,21.2,21.3,21,20.8,19.8
1974,19.2,20.3,20.9,20.9,21.7,21.3,20.7,20.8,20.5,20.6,20.5,19.8
1975,19.1,20.2,21,21,21.3,21.2,20.6,20.7,20.6,20.8,20.5,20.2
1976,19.4,19.8,20.8,20.7,21.1,20.9,20.1,20.2,20.7,20.4,20.2,20
1977,20.2,20.6,21.4,21.5,21.8,21.2,20.5,20.7,20.9,21,20.8,19.9
1978,20.7,21.2,21.1,21,21.4,21,20.2,20.3,20.6,21,20.7,20.6
1979,20.7,20.8,21.5,21.4,21.1,21.4,21,21,21,21.2,21.1,20.2
1980,20.7,21,21.3,21.6,21.6,21.7,20.6,20.8,20.9,21.2,21.5,19.6
1981,19.3,20.8,21.4,21.5,21.5,21.9,21,20.7,21.8,21.2,20.9,20.8
1982,19.2,20.8,18.9,21.4,21.5,21.1,20.1,20.4,20.8,21.5,21.1,20.1
1983,19.1,20.9,22.1,22,22.1,21.5,21.5,20.7,21.1,21.5,21.3,20.7
1984,19.8,20.3,21.3,21.5,21.7,21.6,20.7,21.2,21.3,20.7,21.2,21.1
1985,19.8,20.9,21.8,21.5,21.8,21.3,20.9,21.1,20.7,21.2,21.6,20.4
1986,19.3,21,21.1,21.6,21.9,21.6,20.2,20.7,21.1,20.8,20.7,19.5
1987,20.8,21.1,21.8,22.6,22.5,22,22,22,21.9,21.6,21.7,20.7
1988,19.5,21.1,22.4,21.8,22.4,21.6,21.4,20.4,21.3,21.3,20.7,19.4
1989,19.3,20.4,21.2,21.8,22.1,21.8,21,20.9,21,20.9,21.6,20.6
1990,19.7,20.3,21.8,21.5,21.8,21.5,20.1,21.2,21.1,21.3,21.5,20.7
1991,20.2,20.9,21.2,21.3,22.1,22.3,21.1,20.9,21.2,20.9,21.1,21.2
1992,19.5,21,21.6,21.7,21.6,21.3,20.4,21.2,21,21.1,21.1,21.7
1993,19.6,21,20.8,21.4,21,22,20.6,20.9,21.4,21.7,21.9,21.3
1994,20.2,21,21.7,21.7,21.9,21.9,20.6,20.9,21.3,21.3,21.4,20.9
1995,19.6,21.1,21.8,21.8,22.4,21.9,21.3,21.5,21.4,21.3,21.7,20.7
1996,21,21.1,21.7,22,22.2,22.2,21.4,21.2,21.1,21.5,21.4,21
1997,20.7,20.6,21.7,21.4,21.9,21.6,20.9,21,21.7,22.1,21.7,21.4
1998,20.5,22.3,23.1,22.9,23,22.2,21.5,21.1,21.3,21.7,21.8,21.5
1999,20.4,20.2,21.4,21.5,22.2,21.7,21.6,21.3,21.3,21.1,21.8,20.9
2000,20.4,20.4,21.9,21.5,22,22,20.8,21.1,21,21.1,21.6,20.9
2001,18.9,20.5,21.5,21.5,21.8,22.1,20.7,21,21.2,21.9,21.7,20.5
2002,20,20.8,22,21.9,22.4,21.8,20.9,21.3,21.3,20.9,20.7,20.9
2003,20.3,21.8,21,21.9,22.6,21.9,21.1,21.5,21,22,21.5,21.2
2004,21,21.5,22.2,21.8,22.2,21.6,21,21.1,21.4,21.8,21.5,22
2005,19.8,22.4,22.6,22.2,22.5,22.1,21.3,21.1,21.9,21.8,22,21.4
2006,20.3,21.8,21.5,22.1,21.9,22.6,21.5,21.5,21.5,21.7,21.3,20.4
2007,20.3,21.2,22.3,21.7,22.5,21.8,21.5,20.8,21.7,21.4,21.4,20.9
2008,18.9,20.9,21.6,22.2,21.8,21.6,20.8,20.9,21.1,21.2,21.4,20.8
2009,19.1,21.8,21.7,22.2,22.1,21.8,21.2,21.3,21,21.1,21.2,21.4
