1910    17.260
1911    13.360
1912    33.980
1913    16.900
1914    13.620
1915    36.220
1916    11.460
1917    22.960
1918    17.260
1919     7.900
1920    11.460
1921    17.440
1922    24.800
1923    29.580
1924    30.820
1925    18.460
1926    26.720
1927    46.600
1928    23.620
1929    28.980
1930    15.800
1931    12.000
1932    11.920
1933    20.820
1934    22.280
1935     6.600
1936    19.700
1937    16.860
1938    16.440
1939     5.720
1940     3.920
1941    19.060
1942     8.760
1943    14.700
1944    21.320
1945    12.840
1946    24.680
1947     9.540
1948     4.980
1949    61.700
1950    17.120
1951     7.480
1952    23.500
1953    27.240
1954    21.220
1955    42.180
1956    16.020
1957    21.320
1958    23.440
1959    16.760
1960     8.660
1961     3.940
1962    14.720
1963    15.020
1964    18.460
1965    33.640
1966    29.940
1967     3.920
1968     2.660
1969     3.160
1970     5.120
1971    10.320
1972    35.660
1973    38.720
1974     9.720
1975    16.880
1976    12.740
1977     8.480
1978     8.400
1979    11.660
1980     9.320
1981     5.760
1982    24.260
1983    16.360
1984     9.020
1985    13.440
1986    19.620
1987     8.860
1988    20.180
1989    15.240
1990     9.220
1991    23.680
1992    30.680
1993     3.480
1994    22.540
1995    36.720
1996    15.100
1997     6.720
1998    12.740
1999    28.800
2000    25.200
2001    13.000
2002    29.820
2003    25.240
2004    30.240
2005    50.820
2006    42.300
2007    10.900
2008    32.180
2009    36.980
2010    38.860
2011    48.440
2012    35.120