1910    12.140
1911    32.300
1912    29.960
1913     7.580
1914    16.220
1915    20.780
1916    11.300
1917    29.320
1918     6.920
1919    11.620
1920    21.300
1921    38.480
1922    22.320
1923     7.020
1924    21.640
1925    30.080
1926    18.400
1927    36.700
1928    17.780
1929    28.300
1930    14.400
1931    22.020
1932    27.500
1933    28.940
1934     8.580
1935     6.360
1936    15.440
1937    10.960
1938    15.780
1939     9.860
1940    35.800
1941    20.100
1942     7.380
1943    21.280
1944     8.940
1945     7.280
1946    14.680
1947    15.400
1948    21.000
1949    25.320
1950    10.660
1951    10.240
1952     7.260
1953    19.580
1954    37.900
1955    18.680
1956    13.440
1957    15.800
1958    37.780
1959    15.240
1960    24.740
1961    15.380
1962    10.720
1963    28.260
1964    32.580
1965    12.340
1966    32.240
1967    16.140
1968    28.080
1969    36.260
1970     7.760
1971    11.660
1972    16.280
1973    14.440
1974    10.620
1975    27.900
1976    36.220
1977     6.720
1978    17.340
1979    35.180
1980     4.900
1981    28.340
1982    13.600
1983    31.280
1984    10.620
1985    13.820
1986    20.520
1987     4.180
1988    18.420
1989    25.640
1990    49.320
1991    35.080
1992    23.400
1993     6.280
1994    17.740
1995    15.640
1996    22.600
1997    13.960
1998    48.140
1999    24.980
2000    12.660
2001    12.500
2002    23.820
2003    30.500
2004    20.000
2005    12.700
2006    26.420
2007    46.080
2008    10.580
2009    18.180
2010    16.200
2011    33.820
2012    39.720