Year | Value | 2021 | 20,505 | 2020 | 9,809 | 2019 | 60,540 | 2018 | 48,355 | 2017 | 18,509.38 | 2016 | 10,579 | 2015 | 12,805 | 2014 | 4,332 | 2013 | 4,332 | 2012 | 8,993 | 2011 | 9,697 | 2010 | 7,692 | 1994 | 300 | 1992 | 500 | 1991 | 200 | 1990 | 7,800 | 1989 | 12,600 | 1988 | 12,400 | 1987 | 8,400 | 1986 | 8,400 | 1985 | 7,900 | 1984 | 6,700 | 1983 | 7,400 | 1982 | 6,500 | 1981 | 5,500 | 1980 | 8,800 | 1979 | 10,400 | 1978 | 10,400 | 1977 | 10,100 | 1976 | 8,600 | 1975 | 7,300 | 1974 | 7,700 | 1973 | 7,300 | 1972 | 6,500 | 1971 | 5,800 | 1970 | 5,300 |
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