Year Total 1900 70 1905 70 1910 100 1915 55 1920 100 1925 120 1930 250 1935 100 1940 150 1945 150 1950 200 1955 400 1960 700 1965 850 1970 800 1975 560 1980 800 1985 1200 1990 2500 1995 3900 2000 11700 2002 7300
