1910    15.940
1911    10.880
1912    36.120
1913     8.780
1914    17.280
1915     8.520
1916    12.500
1917    40.600
1918     8.420
1919     8.440
1920    11.380
1921    39.920
1922    14.060
1923     6.940
1924    35.120
1925     8.660
1926    17.980
1927    23.060
1928    11.600
1929    29.540
1930    19.960
1931    51.500
1932     7.000
1933    21.720
1934    28.140
1935     8.280
1936    20.400
1937    13.900
1938    31.520
1939    19.360
1940    31.000
1941    24.320
1942     8.820
1943     7.620
1944    11.360
1945    15.920
1946    22.180
1947     4.120
1948     3.500
1949    14.120
1950    39.560
1951    26.060
1952     6.900
1953    41.020
1954    36.820
1955    13.880
1956    13.680
1957    10.180
1958    34.020
1959     4.980
1960    17.340
1961     8.220
1962     5.720
1963    33.860
1964    19.380
1965     6.200
1966    18.460
1967     3.460
1968     8.560
1969    15.300
1970     7.380
1971     6.480
1972    17.800
1973    37.860
1974    17.760
1975    15.820
1976    32.900
1977     7.620
1978    34.600
1979    48.000
1980    10.580
1981    10.660
1982    16.680
1983    12.820
1984     8.460
1985    21.800
1986    14.940
1987    19.360
1988    22.900
1989    24.940
1990    41.540
1991    24.120
1992     8.140
1993    35.740
1994    17.140
1995     8.160
1996    36.300
1997    16.560
1998    47.480
1999    29.220
2000    15.000
2001    12.320
2002    24.660
2003    21.620
2004    26.640
2005    15.780
2006    31.300
2007    28.840
2008    31.860
2009    26.020
2010    20.900
2011    32.020
2012    56.100