1910    24.280
1911    28.380
1912    33.920
1913    12.280
1914    20.180
1915    29.220
1916    19.660
1917    40.020
1918    18.120
1919    29.160
1920    21.000
1921    36.060
1922    10.020
1923    15.880
1924    27.220
1925    20.520
1926     6.900
1927    23.020
1928     7.580
1929    17.700
1930     6.900
1931    15.940
1932    10.600
1933    36.300
1934    37.980
1935    18.060
1936    23.920
1937     7.500
1938    27.580
1939    19.320
1940    23.020
1941    37.340
1942    18.980
1943    13.300
1944     7.140
1945    16.960
1946    22.160
1947     5.320
1948     7.120
1949    15.660
1950    15.200
1951    25.380
1952    16.040
1953    23.100
1954    53.680
1955    18.660
1956    35.740
1957    24.720
1958    25.960
1959     8.220
1960    16.960
1961    28.240
1962     5.840
1963    25.820
1964    12.360
1965     8.300
1966    21.020
1967     6.880
1968    31.880
1969    10.520
1970     6.180
1971     5.220
1972     4.320
1973    29.360
1974    18.460
1975    14.620
1976    26.980
1977     6.860
1978    15.400
1979    39.380
1980    10.060
1981    12.880
1982     7.680
1983    31.140
1984     6.180
1985    19.680
1986    24.020
1987    18.060
1988     9.700
1989    21.820
1990    13.480
1991    25.220
1992    23.540
1993    26.740
1994    10.540
1995    11.940
1996    14.380
1997    21.200
1998    39.260
1999    30.880
2000    18.780
2001    18.920
2002    11.840
2003    13.380
2004    19.900
2005    19.980
2006    42.060
2007    27.700
2008    19.820
2009    21.260
2010    14.680
2011    38.360
2012    57.440