1910    38.180
1911    25.140
1912    16.420
1913    12.900
1914    11.240
1915     9.380
1916    19.100
1917    26.320
1918    14.220
1919     4.240
1920    13.020
1921    22.900
1922     5.640
1923    33.320
1924    18.060
1925    22.140
1926    27.860
1927     8.420
1928    10.420
1929    12.200
1930     4.360
1931    21.000
1932     9.320
1933    13.540
1934    43.100
1935     7.020
1936     8.320
1937    15.360
1938    11.900
1939    18.300
1940    31.460
1941    10.320
1942    10.900
1943    35.420
1944    13.780
1945    19.040
1946    21.760
1947    28.800
1948     5.740
1949    10.340
1950    52.620
1951    25.720
1952     7.620
1953     6.200
1954    14.760
1955    13.480
1956    28.460
1957    10.720
1958    16.280
1959     9.820
1960    32.120
1961     6.860
1962     8.300
1963     6.540
1964    14.320
1965    26.260
1966    10.940
1967     8.100
1968     4.860
1969     7.860
1970    10.000
1971    12.320
1972     8.760
1973    36.540
1974    11.880
1975    15.360
1976    12.560
1977    60.860
1978     7.280
1979    30.000
1980     9.260
1981    18.240
1982     8.260
1983    26.060
1984    19.340
1985    46.460
1986    21.500
1987    44.120
1988    25.140
1989    16.840
1990    11.860
1991    40.140
1992     7.480
1993    22.760
1994    15.360
1995    10.100
1996    39.800
1997    13.120
1998    34.280
1999    23.720
2000    42.080
2001    21.160
2002    22.500
2003     7.040
2004    25.200
2005     9.020
2006    28.900
2007    18.780
2008    18.540
2009    16.440
2010    44.480
2011    27.820
2012    55.300
2013    43.080