1910    16.940
1911    35.260
1912    30.280
1913    36.780
1914    10.480
1915     5.480
1916    47.340
1917    13.760
1918     8.940
1919    33.680
1920    17.080
1921     6.220
1922    37.320
1923    15.020
1924    25.720
1925    20.780
1926    25.040
1927    12.440
1928    12.860
1929    45.960
1930    26.700
1931    16.220
1932    12.500
1933    19.080
1934    52.560
1935    27.060
1936    17.900
1937    20.660
1938     5.160
1939    23.680
1940    33.820
1941    23.640
1942     8.820
1943    11.320
1944    15.760
1945     8.060
1946     6.040
1947     7.680
1948    52.880
1949    24.980
1950    26.340
1951    15.000
1952    14.520
1953    18.660
1954    13.980
1955    39.740
1956    16.220
1957     8.700
1958    37.360
1959    13.480
1960     3.380
1961     5.880
1962     4.520
1963     4.740
1964    33.140
1965    15.100
1966    14.800
1967    11.120
1968     6.260
1969     6.540
1970    10.000
1971    19.740
1972     7.180
1973     4.380
1974     8.320
1975    23.980
1976     9.680
1977     6.040
1978     3.720
1979     7.600
1980    17.140
1981    23.140
1982    33.180
1983    41.240
1984    36.540
1985    33.480
1986     9.000
1987    38.200
1988    14.920
1989     4.760
1990    21.220
1991    10.760
1992    49.900
1993    18.120
1994    24.340
1995    35.200
1996    44.660
1997    32.440
1998    49.840
1999    15.900
2000     7.640
2001    18.300
2002    24.100
2003    47.020
2004    28.840
2005    13.420
2006    27.700
2007    21.700
2008     6.960
2009    11.260
2010    28.420
2011    13.640
2012    32.020