1901,31.5,31.9,31.9,32.3,32.7,32.9,33.2,33.6,33.4,32.4,31.9,32
1902,31.5,31.9,31.7,32.1,32.4,32.8,33.3,33.6,33.3,32.3,31.8,32
1903,31.7,31.7,31.7,32.2,32.7,33.2,33.3,33.5,33.3,32.4,31.9,31.9
1904,31.5,31.5,31.7,31.9,32.5,32.9,33.1,33.3,33.2,32.2,32,32
1905,31.5,31.6,31.7,32.2,32.4,33,33.2,33.6,33.3,32.3,32.1,32
1906,31.4,31.6,31.8,32.1,32.5,32.8,33.2,33.6,33.3,32.4,32,31.7
1907,31.2,31.3,31.5,32,32.3,32.9,33.3,33.5,33.3,32.3,31.9,32
1908,31.5,31.6,31.7,32.1,32.5,33,33.4,33.7,33.4,32.4,31.9,32
1909,31.4,31.5,31.9,32,32.5,32.8,33.3,33.4,33.4,32.4,31.7,31.7
1910,31.3,31.4,31.6,31.9,32.3,32.9,33.2,33.5,33.6,32.2,32,32.1
1911,31.3,31.4,31.5,32,32.3,33,33.2,33.6,33.4,32.4,32.1,32
1912,31.6,31.8,31.9,32,32.5,32.9,33.4,33.6,33.4,32.3,32,32
1913,31.4,31.4,31.5,31.8,32.7,32.6,33.1,33.3,33.2,32.6,31.8,31.7
1914,31.4,31.5,31.7,31.9,32.3,32.7,33.1,33.4,33.3,32.3,32,32.2
1915,31.5,31.5,31.9,32,33.6,34,34.5,35,34.2,33.8,32.7,32.6
1916,31.8,31.6,31.6,32.9,33.3,33.6,33.8,33.5,33.9,32.4,31.8,31.5
1917,30.9,30.5,31.6,32.2,32.5,32.5,33.4,33.5,33.4,32.6,31.7,31.8
1918,31.1,31.3,30.7,31.7,31.3,32.1,33.5,34.1,33.5,32.9,31.8,32
1919,31.4,31.6,31.7,32,32.6,32.9,33.1,33.5,33.2,32.2,31.7,31.9
1920,31.4,31.6,31.8,32.1,32.6,32.8,33.1,33.4,33.2,32.2,31.8,31.9
1921,31.4,31.4,30.8,31.6,31.9,32.7,33.3,33.1,33.4,31.6,31.6,31.7
1922,31.1,31,30.9,32.1,31.9,32.1,32.7,33.3,33.2,31.9,31.2,31.4
1923,30.5,30.6,31.3,32,32.3,32.7,33.1,33.2,33.7,32.1,32.1,32.1
1924,31.7,31.9,32.9,33,32.8,32.4,32.7,34.2,33,32.1,31.8,31.6
1925,30.9,31,30.9,32.1,32.6,33,32.8,33.4,33.1,32.7,32,32.4
1926,31.7,32.4,32.4,33.5,33.5,33.3,33.3,33.6,33.2,32.7,32.1,31.9
1927,31.1,31.2,31.6,31.5,31.8,32.5,32.3,33.5,32.8,32.4,32.1,31.5
1928,31.2,31.7,31.7,32.3,32.5,32.7,33.3,33.3,33.3,32.5,31.8,31.8
1929,31.4,31.9,32.1,31.9,32.2,32.8,33.2,33.4,33.4,32.6,32.1,31.9
1930,31.1,31.3,31.9,32.1,32.4,32.6,33.1,33.4,33.2,32.1,32.2,32.3
1931,31.8,31.9,32.6,32.7,33.2,33.3,33.2,33.7,33.3,32.6,32,32
1932,31.4,31.5,31.7,32.7,32.4,32.9,33,33.7,33.5,32.1,32,32
1933,32.4,31.7,32.2,32.8,33.9,34,35,34.9,34.3,33.7,32.9,32.8
1934,32,31.1,31.4,33.6,34.6,33.3,34.6,35.2,35.2,34.2,33.1,33.3
1935,32.1,32.3,32.4,32.5,33.1,34.4,34.5,34.2,34.6,33.7,32.7,32.7
1936,32,31.2,32.3,32.8,33.8,33.7,34.7,35.4,34.7,33.8,33.6,32.4
1937,31.6,31.8,32.8,33.1,32.8,33.1,33.5,33.9,33.7,32.8,32.5,32.7
1938,32.2,32,31.8,31.9,32.9,33.9,34,33.8,34.3,33.2,32,32.2
1939,31.9,31.4,31.3,32.5,33.2,33.6,33.7,34.9,34.9,33.2,32.4,33.1
1940,32.5,33.3,32.8,33.6,34.2,34.1,34.8,35.3,34.5,33.3,32.6,33.3
1941,32.9,33.1,33.6,33.6,33,33.9,34.2,34.6,34.5,34.5,34,34
1942,33.5,29.8,32.8,33.9,33,34,34.4,34.7,34,33.1,32.5,33.2
1943,32.8,32.3,32.7,32.9,32.9,33.8,34.8,34.8,34.9,33.6,33.4,33
1944,32.8,32.6,32.5,32.7,32.8,33,34.8,35,33.9,32.9,32.3,33.1
1945,30.9,30.4,31.2,30.9,29.8,32,32.6,32.8,32.7,32.5,32.6,32.7
1946,31.3,31.4,31.5,31.7,32.1,32.5,32.9,33,33.5,33.3,32.3,33.1
1947,32,32.5,33.1,32.8,33.3,33.8,33.8,34.3,34.7,33.9,33.8,33.3
1948,31.7,31.4,31.8,31.1,32.3,32.3,32.3,32.8,33.3,33.1,32.7,32.7
1949,30.7,30.7,31.4,32.4,33.6,33.9,33.6,33.6,33.8,33,33.4,32.6
1950,31,32,32.4,31.5,31.8,32.3,32.4,32.9,33.2,32.2,31.8,32.1
1951,31.3,31,31.2,32.9,32.9,33.5,33.8,33.9,34.1,33.8,33,32.8
1952,31.6,32,32.1,32.8,33.6,33.9,34.7,35.1,35.8,34.8,33.8,33.3
1953,33,32.4,32.6,33.9,33.7,34.9,34.7,34.9,35.4,35.1,34.4,33.9
1954,32.3,32.9,33.4,32.8,33.9,34,33.4,33.9,34.5,33.3,33.1,32.5
1955,32.9,32.1,31.4,32.9,32.9,33.6,32.3,33.6,33.8,32.4,33,32.9
1956,30.2,30.9,31.9,33,34,34.2,34.3,34.9,35.1,33.8,33.6,32.8
1957,32.5,32.4,33.4,33.2,33.7,34.1,34.4,35.1,35.2,34.6,34.2,34.2
1958,33.9,34.2,35.3,32.9,33.5,34.1,33.9,33.8,35.4,34.6,34.5,34.4
1959,32.7,32.3,32.4,33.1,32.3,33.2,34,34,34.3,33.5,32.7,33.5
1960,32.6,32.4,31.7,31.9,33,32.8,33.5,33.3,33.5,32.8,32.6,30.9
1961,31.5,31.5,31.6,32.3,33.3,33.3,32.9,33.8,33.9,32.9,31.5,32.6
1962,32.6,32.1,32.2,33.2,33.1,33.2,34.5,34.2,34.8,34,33.4,33.9
1963,32.4,32.8,32.2,32.7,32.2,34,34.1,34.7,34.3,34,32.8,33.8
1964,33.1,33,32.8,32.8,33.5,32.9,33,33.7,33.5,32.9,32.7,31.6
1965,31.1,31.5,32.7,32.8,32.2,32.9,33.9,34.3,34.4,34.1,32.5,33.2
1966,33,32.4,32.8,33.1,33.3,33,33.7,34.3,34.1,32.9,31.5,31.7
1967,31.7,32.1,31.5,31.7,33,33.3,33.1,34.4,34.3,33.7,33.1,33
1968,32,32.1,32.2,32,32.9,33.1,33.9,34.5,34,33.6,33.5,33.5
1969,32,32,33.4,33.4,34.2,34.4,34.4,33.9,34.6,33,32.2,33.4
1970,31.8,32,32.4,33.1,33,33.7,33.4,33.5,33.1,32.1,31.4,31.1
1971,31.2,31.6,31.8,32.6,31.8,33.2,33.2,33.5,33.1,32.2,32.2,31.8
1972,31.1,31.8,31.8,31.5,32.3,33.7,33.7,34.2,34.1,32.8,33.3,33.2
1973,33.1,32.5,33,33.3,33.7,33.4,33.6,33.7,32.7,32.4,30.8,30.9
1974,30.7,31.1,31.3,31.7,31.4,32.9,33.2,33.5,32.1,32.3,31,32.4
1975,30.9,31,31.5,31.9,32,32.9,32.8,33.3,32.7,31.7,30.8,29.3
1976,30.2,29.7,30.5,31.5,32.3,32.6,32.7,33.6,33.9,31.9,32.5,32.3
1977,32,32,31.3,32.6,32.2,32.7,33.8,34,34.8,33.1,32.1,32.8
1978,32,32.5,32.3,31.5,32.7,32.8,33.1,33.7,33.6,32.7,32.7,32.3
1979,31.7,32.8,31.9,31.9,32.4,32.2,33.2,33.8,32.8,32.6,31.5,31.1
1980,31.3,31.6,32.1,32.9,33.9,33.4,33.5,33.3,33.8,32.6,31.5,32.1
1981,32.5,31.9,32.7,30.8,31.1,31.7,32.7,32.6,32.5,31.8,31.9,31.6
1982,31.2,31.4,31.6,31.4,31.5,33.1,33.3,34.2,33.9,31.8,32.3,31.8
1983,32.2,33.1,33.1,32.7,32.8,34.2,34.2,34,34.1,32.7,32.9,32.8
1984,31.5,31.8,31.6,32.5,33.1,33.3,32.6,33,32.4,31.7,31.7,30.5
1985,30.6,30.8,30.9,31.6,31.9,32.7,33.7,33.5,33.1,32.1,31.3,30.8
1986,31.2,31.4,32.4,32,32.7,33.4,34.3,34.1,32.9,31.7,31.2,31.9
1987,31.3,31.9,31.9,33.3,31.9,33.5,34,33.1,33.2,31.1,31.7,31.9
1988,31.2,31.3,32,32.7,33.2,33.3,33,31.4,32,31.5,31,30.2
1989,29.8,30.1,32.1,33.8,32.7,33.1,33.4,33.9,32.7,32.8,32.9,32.7
1990,32,31.2,31.8,32.4,32.8,34.3,34.5,36.1,35.1,33.3,32.7,32.7
1991,32.2,33,32.5,32.9,33.6,34.4,35.3,34.6,34.3,32.9,31.7,31.3
1992,31.6,31.7,32.6,32.3,32.6,33.2,32.7,33.6,33.3,32.5,31.2,31.3
1993,31.3,31.4,32,32.2,31.7,33.5,34,33.9,33,33.8,32.3,31.9
1994,32,32,32.8,33.2,32.8,33.5,33.3,34.2,34.1,32.9,32.4,32.5
1995,32.8,32.4,31.2,33.1,33.7,33.7,33.7,33,34.4,32.5,32.8,32.8
1996,32.3,31.5,33.3,33.8,33.6,33.5,33.4,32.9,33.6,32.2,29.8,32
1997,32.2,32.3,32,32.4,34.4,33.8,34,35.7,34.6,33.8,34.1,34.2
1998,33.8,32.8,32.9,33.4,33.1,32.8,34.6,33.4,33.2,33.1,31,32.1
1999,31.3,31,32.2,32.5,33.4,33.6,33.7,33.5,32.8,32,31.6,30.6
2000,30.3,30.8,31,32.8,32.9,33.6,33.6,34.4,32.9,33.1,31.9,32.6
2001,31.8,32.2,31.7,32.8,33.7,33.6,34.2,34.5,34.7,33.4,32.1,32.8
2002,32.7,32.1,32.3,32.3,33.4,33.5,34.6,35.4,33.6,32.4,32.5,32.1
2003,32.9,31.5,31.9,33.2,33.2,32.5,33.9,34.4,33.9,32.2,31.9,31.2
2004,31.9,32.6,32.7,33,33.1,34.2,34.1,35.1,32.3,33,32,31.9
2005,31.2,31,33.8,33.6,33.4,34.2,34.7,34.7,35.1,33.1,31.9,32
2006,31.9,32,30.9,32.2,31.5,33.9,34.1,34.9,35,33.5,33.2,32.8
2007,31,32.8,32.4,33,33.4,34.1,34.4,33.3,33.4,32.6,32.8,32.8
2008,31.4,31,32.2,32.3,32.9,33.3,33.4,33.8,33.8,32.2,31.6,31
2009,31.9,31,30.4,32.7,33.2,34.6,34.4,34.4,34.7,34.3,33.2,33.7
