1910    15.780
1911    14.980
1912    18.400
1913    16.980
1914    22.500
1915    45.780
1916     7.980
1917    29.200
1918    36.580
1919    25.420
1920    29.360
1921    12.020
1922     6.900
1923    13.240
1924    13.600
1925    27.720
1926     7.260
1927    21.460
1928    21.620
1929     6.320
1930    19.060
1931    15.420
1932    10.360
1933    13.400
1934    50.880
1935     9.060
1936    50.020
1937    12.320
1938     7.920
1939     7.200
1940    22.600
1941    28.820
1942    16.020
1943    27.660
1944     5.720
1945    21.740
1946    16.620
1947     9.840
1948    10.580
1949    11.540
1950    31.780
1951    23.320
1952    32.300
1953    23.340
1954    48.860
1955    13.500
1956    31.360
1957    11.760
1958    12.120
1959     8.020
1960     9.800
1961    34.320
1962     4.660
1963    16.540
1964     9.920
1965     7.600
1966     7.860
1967    28.220
1968    12.440
1969     4.120
1970     6.220
1971     8.900
1972    11.920
1973    21.240
1974    21.020
1975    26.700
1976    28.420
1977     5.520
1978    10.420
1979    18.960
1980    49.720
1981    13.860
1982     6.980
1983    11.860
1984     9.620
1985    13.840
1986     6.900
1987    15.300
1988     7.040
1989    35.740
1990     6.540
1991    13.620
1992    49.440
1993    20.620
1994     9.800
1995    11.140
1996    14.400
1997    14.860
1998    31.340
1999    15.360
2000    19.740
2001    22.060
2002    16.520
2003    12.140
2004    33.060
2005    13.300
2006    23.500
2007    39.840
2008    13.280
2009    20.100
2010    33.140
2011    66.380
2012    31.080