1910    15.460
1911    18.520
1912    28.280
1913    20.220
1914    12.360
1915    54.660
1916    28.840
1917    28.860
1918     9.520
1919    36.800
1920     9.820
1921    15.040
1922    12.540
1923    15.900
1924    29.160
1925     9.620
1926    11.440
1927    32.640
1928    37.940
1929    11.800
1930    13.100
1931    36.940
1932    10.060
1933    33.460
1934    32.380
1935    11.240
1936    58.560
1937    26.360
1938    10.860
1939    12.320
1940    24.420
1941    16.360
1942    14.840
1943    11.540
1944    30.600
1945    22.420
1946     6.060
1947    12.000
1948    10.180
1949     8.140
1950    30.380
1951    40.840
1952     9.320
1953    15.560
1954    12.440
1955     8.600
1956    13.040
1957     6.660
1958    16.600
1959    12.780
1960     9.760
1961    35.900
1962    15.760
1963    11.800
1964    10.320
1965    14.100
1966     6.980
1967    20.620
1968    12.760
1969    11.000
1970    23.920
1971     4.780
1972     6.440
1973    11.360
1974     8.980
1975    11.980
1976    18.820
1977     9.620
1978    12.320
1979     6.940
1980    14.980
1981    13.300
1982    11.820
1983    22.540
1984    14.960
1985    12.020
1986     7.580
1987     6.840
1988    55.540
1989    17.260
1990     8.000
1991    16.600
1992    36.800
1993    61.160
1994    13.360
1995    20.600
1996    13.440
1997    13.920
1998    16.240
1999    15.780
2000    17.060
2001    27.640
2002    23.700
2003    23.780
2004    27.940
2005    12.420
2006    33.020
2007    42.820
2008    13.720
2009    32.860
2010    25.280
2011    30.100
2012    37.880