1910    10.800
1911    18.260
1912    22.140
1913    26.040
1914    13.740
1915    14.100
1916    33.480
1917    17.300
1918     7.780
1919    16.240
1920    11.240
1921    10.300
1922     6.320
1923    28.520
1924    27.360
1925    12.180
1926    16.440
1927     7.060
1928    13.460
1929    15.280
1930     4.940
1931    27.180
1932     7.520
1933    13.780
1934    17.460
1935     6.680
1936    14.800
1937     9.020
1938    15.940
1939     6.840
1940    15.120
1941    19.960
1942    12.280
1943    25.060
1944    31.520
1945    12.520
1946     1.680
1947    25.860
1948    13.820
1949    14.260
1950     9.380
1951    10.120
1952    11.300
1953    21.400
1954    19.520
1955     8.660
1956     2.840
1957     2.800
1958    24.580
1959    18.540
1960    22.360
1961    24.200
1962     1.700
1963    16.060
1964     8.520
1965    32.640
1966     6.020
1967    14.420
1968     3.620
1969     5.000
1970     8.200
1971     4.380
1972    12.380
1973     0.000
1974     9.300
1975     5.300
1976    34.380
1977    20.460
1978    15.360
1979     4.400
1980    10.380
1981    25.340
1982    15.340
1983    43.120
1984    21.140
1985     9.260
1986     5.100
1987    10.860
1988     9.880
1989     7.480
1990    11.920
1991     4.280
1992    19.000
1993    26.520
1994    17.020
1995    21.800
1996    28.920
1997    21.420
1998    24.960
1999     2.840
2000    17.060
2001    22.940
2002    25.020
2003    35.420
2004    15.340
2005    24.640
2006    31.580
2007    35.020
2008    25.820
2009    22.480
2010     7.040
2011    23.100
2012    29.020