|
|
1889
|
30.8
|
|
1890
|
36.1
|
|
1891
|
30.7
|
|
1892
|
31.8
|
|
1893
|
32.0
|
|
1894
|
30.8
|
|
1895
|
28.5
|
|
1896
|
34.8
|
|
1897
|
32.8
|
|
1898
|
31.0
|
|
1899
|
23.9
|
|
1900
|
31.7
|
|
1901
|
32.3
|
|
1902
|
32.4
|
|
1903
|
30.3
|
|
1904
|
33.9
|
|
1905
|
29.2
|
|
1906
|
32.6
|
|
1907
|
38.2
|
|
1908
|
34.3
|
|
1909
|
34.1
|
|
1910
|
27.6
|
|
1911
|
34.4
|
|
1912
|
26.4
|
|
1913
|
28.3
|
|
1914
|
30.9
|
|
1915
|
30.0
|
|
1916
|
31.8
|
|
1917
|
31.7
|
|
1918
|
31.6
|
|
1919
|
30.6
|
|
|
|
1920
|
33.5
|
|
1921
|
35.8
|
|
1922
|
31.1
|
|
1923
|
35.2
|
|
1924
|
32.8
|
|
1925
|
29.9
|
|
1926
|
34.8
|
|
1927
|
34.5
|
|
1928
|
31.3
|
|
1929
|
28.8
|
|
1930
|
32.0
|
|
1931
|
33.5
|
|
1932
|
34.3
|
|
1933
|
30.0
|
|
1934
|
39.7
|
|
1935
|
37.4
|
|
1936
|
31.4
|
|
1937
|
30.9
|
|
1938
|
34.4
|
|
1939
|
32.4
|
|
1940
|
31.5
|
|
1941
|
34.1
|
|
1942
|
29.8
|
|
1943
|
36.0
|
|
1944
|
31.4
|
|
1945
|
32.1
|
|
1946
|
31.8
|
|
1947
|
32.3
|
|
1948
|
29.2
|
|
1949
|
28.5
|
|
1950
|
35.1
|
|
|
|
1951
|
32.5
|
|
1952
|
34.8
|
|
1953
|
35.3
|
|
1954
|
37.4
|
|
1955
|
31.1
|
|
1956
|
31.3
|
|
1957
|
34.8
|
|
1958
|
36.4
|
|
1959
|
32.3
|
|
1960
|
27.8
|
|
1961
|
31.9
|
|
1962
|
27.8
|
|
1963
|
31.1
|
|
1964
|
29.2
|
|
1965
|
34.0
|
|
1966
|
31.1
|
|
1967
|
33.3
|
|
1968
|
28.7
|
|
1969
|
34.9
|
|
1970
|
36.6
|
|
1971
|
36.2
|
|
1972
|
33.9
|
|
1973
|
29.0
|
|
1974
|
31.5
|
|
1975
|
31.2
|
|
1976
|
35.8
|
|
1977
|
32.7
|
|
1978
|
30.1
|
|
1979
|
24.5
|
|
1980
|
33.0
|
|
1981
|
39.2
|
|
|
|
1982
|
32.9
|
|
1983
|
34.2
|
|
1984
|
27.6
|
|
1985
|
30.1
|
|
1986
|
35.1
|
|
1987
|
32.3
|
|
1988
|
27.3
|
|
1989
|
29.4
|
|
1990
|
30.9
|
|
1991
|
30.4
|
|
1992
|
34.7
|
|
1993
|
28.4
|
|
1994
|
31.3
|
|
1995
|
33.9
|
|
1996
|
31.4
|
|
1997
|
30.8
|
|
1998
|
31.7
|
|
1999
|
35.1
|
|
2000
|
35.8
|
|
2001
|
28.4
|
|
2002
|
30.5
|
|
2003
|
33.1
|
|
2004
|
33.0
|
|
2005
|
34.5
|
|
2006
|
32.9
|
|
2007
|
29.4
|
|
2008
|
29.9
|
|
2009
|
34.0
|
|
2010
2011
2012
|
27.8
29.8
31.6
|
|