1910    34.680
1911    16.960
1912    36.820
1913    17.180
1914    17.160
1915     7.560
1916    28.160
1917    46.080
1918     6.960
1919     5.660
1920     8.800
1921    37.600
1922     9.100
1923    16.160
1924    36.840
1925     8.680
1926    25.340
1927    10.900
1928     6.280
1929    31.620
1930    13.200
1931    57.920
1932     7.140
1933    19.840
1934    35.540
1935    10.380
1936    24.120
1937    16.940
1938    20.500
1939    17.320
1940    11.480
1941    21.580
1942     5.680
1943     8.360
1944     6.180
1945     8.080
1946    10.020
1947     3.300
1948    11.020
1949    14.820
1950    47.420
1951    53.620
1952    15.460
1953    16.660
1954    10.120
1955     9.260
1956    13.440
1957    11.680
1958    14.420
1959     9.540
1960    16.820
1961    12.140
1962     5.320
1963    14.840
1964    15.660
1965    18.560
1966    15.880
1967     9.660
1968    12.140
1969     7.480
1970     5.200
1971     9.000
1972    38.760
1973    27.200
1974     4.180
1975     7.520
1976    26.680
1977    19.480
1978    24.020
1979    34.560
1980    13.560
1981    16.920
1982    19.080
1983    22.920
1984    16.960
1985    24.360
1986    23.300
1987    43.100
1988    20.580
1989    20.860
1990    19.720
1991    18.940
1992     8.260
1993    41.480
1994    12.720
1995     9.840
1996    39.360
1997     8.960
1998    51.020
1999    46.360
2000    14.460
2001    31.980
2002    19.320
2003     4.620
2004    15.240
2005    29.620
2006    43.520
2007    24.840
2008    31.500
2009    19.360
2010    53.480
2011    15.040
2012    54.460