| Year | Value | | 2021 | 1,620,013 | | 2020 | 764,661 | | 2019 | 5,434,292 | | 2018 | 4,812,610 | | 2017 | 1,591,490.01 | | 2016 | 2,019,816 | | 2015 | 2,142,554 | | 2014 | 476,484 | | 2013 | 476,484 | | 2012 | 784,944.25303469 | | 2011 | 761,778.17435545 | | 2010 | 641,129 | | 1994 | 31,500 | | 1992 | 53,000 | | 1991 | 27,700 | | 1990 | 701,600 | | 1989 | 1,160,800 | | 1988 | 1,113,000 | | 1987 | 535,000 | | 1986 | 535,000 | | 1985 | 540,000 | | 1984 | 435,000 | | 1983 | 454,000 | | 1982 | 480,600 | | 1981 | 457,000 | | 1980 | 619,900 | | 1979 | 687,800 | | 1978 | 675,300 | | 1977 | 672,400 | | 1976 | 568,000 | | 1975 | 387,600 | | 1974 | 290,900 | | 1973 | 208,800 | | 1972 | 186,200 | | 1971 | 235,600 | | 1970 | 197,700 |
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