1910    38.040
1911    18.720
1912    30.780
1913    21.020
1914    10.460
1915    10.700
1916    33.320
1917    20.780
1918    10.940
1919    34.480
1920     5.520
1921     5.760
1922    29.300
1923    12.420
1924    27.660
1925    14.540
1926    35.700
1927    11.620
1928     4.560
1929     6.520
1930    16.020
1931    28.040
1932     9.160
1933    15.520
1934    26.660
1935    13.900
1936    15.080
1937    13.300
1938    14.020
1939    12.400
1940    25.280
1941    22.520
1942     8.620
1943    18.940
1944    18.520
1945    12.440
1946     6.280
1947    19.380
1948    23.160
1949    16.020
1950     8.180
1951    26.960
1952     2.440
1953    22.760
1954    44.380
1955    12.360
1956    10.740
1957    12.940
1958    36.160
1959     3.160
1960    13.200
1961    33.420
1962    12.760
1963    16.720
1964    27.700
1965    12.620
1966    11.440
1967    44.080
1968    10.500
1969     8.100
1970    17.140
1971     9.440
1972    11.420
1973    11.000
1974     8.680
1975    13.840
1976    30.880
1977    29.480
1978    14.220
1979     4.120
1980    26.620
1981     4.920
1982    17.080
1983    42.880
1984    29.380
1985    16.640
1986     6.320
1987     6.860
1988    16.640
1989     2.920
1990    23.220
1991    10.240
1992    42.260
1993    53.420
1994    14.100
1995    23.340
1996    19.100
1997    18.920
1998    30.320
1999     8.580
2000    12.460
2001    15.120
2002    18.620
2003    45.380
2004    30.300
2005    10.720
2006    20.080
2007    27.040
2008     6.600
2009    21.840
2010    21.280
2011    16.300
2012    16.420