| Year | Value | | 2021 | 9,412.931 | | 2020 | 8,494.839 | | 2019 | 19,419 | | 2018 | 19,133 | | 2017 | 18,134 | | 2016 | 4,314 | | 2015 | 3,205 | | 2014 | 12,096 | | 2013 | 11,532 | | 2012 | 10,410 | | 2011 | 7,265 | | 2010 | 5,867 | | 1994 | 500 | | 1993 | 500 | | 1992 | 500 | | 1991 | 1,500 | | 1990 | 500 | | 1989 | 700 | | 1988 | 900 | | 1987 | 1,900 | | 1986 | 900 | | 1985 | 3,500 | | 1984 | 3,400 | | 1983 | 3,500 | | 1982 | 3,500 | | 1981 | 1,000 |
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