1910    37.720
1911    22.280
1912    24.440
1913    16.740
1914    15.620
1915    47.320
1916    10.620
1917    28.040
1918    11.160
1919    11.100
1920     9.120
1921    41.460
1922     9.440
1923    12.200
1924    40.080
1925    11.440
1926    18.440
1927    32.180
1928    13.360
1929     9.060
1930    21.420
1931    34.460
1932    12.780
1933    45.200
1934    35.340
1935    12.040
1936    42.480
1937    24.840
1938    10.460
1939     6.560
1940    12.600
1941     7.640
1942     9.040
1943    16.440
1944    11.920
1945    26.360
1946     9.760
1947    11.420
1948     6.580
1949    26.000
1950    33.260
1951    38.120
1952    16.140
1953    19.700
1954    10.120
1955    29.200
1956    12.720
1957    11.920
1958    25.420
1959    14.940
1960     8.380
1961    16.060
1962     8.040
1963    12.580
1964    11.700
1965     6.400
1966     9.420
1967    14.380
1968    18.640
1969     8.100
1970    12.120
1971     8.760
1972    11.880
1973    15.180
1974     6.300
1975    10.900
1976    28.700
1977    15.380
1978    10.000
1979    13.520
1980    13.740
1981     9.720
1982    16.940
1983    46.600
1984     9.600
1985    25.160
1986    11.800
1987    19.540
1988    54.000
1989    11.120
1990    12.800
1991    21.220
1992    43.820
1993    44.220
1994    16.840
1995    27.800
1996    13.380
1997     6.620
1998    15.600
1999    17.440
2000    16.380
2001     7.760
2002    31.380
2003     3.000
2004    40.120
2005    26.700
2006    16.680
2007    23.240
2008    19.820
2009    38.960
2010    51.020
2011    24.860
2012    35.240