Year | Value | 2023 | 29,499 | 2022 | 29,308 | 2021 | 28,870 | 2020 | 28,202 | 2019 | 27,398 | 2018 | 26,562 | 2017 | 25,786 | 2016 | 25,243 | 2015 | 24,690 | 2014 | 23,745 | 2013 | 22,454 | 2012 | 21,256 | 2011 | 20,355 | 2010 | 19,563 | 2009 | 18,836 | 2008 | 18,144 | 2007 | 17,473 | 2006 | 16,828 | 2005 | 16,236 | 2004 | 15,731 | 2003 | 15,419 | 2002 | 15,405 | 2001 | 15,554 | 2000 | 15,671 | 1999 | 15,671 | 1998 | 15,525 | 1997 | 15,292 | 1996 | 15,022 | 1995 | 14,719 | 1994 | 14,401 | 1993 | 14,086 | 1992 | 13,775 | 1991 | 13,425 | 1990 | 13,035 | 1989 | 12,639 | 1988 | 12,231 | 1987 | 11,806 | 1986 | 11,344 | 1985 | 10,861 | 1984 | 10,288 | 1983 | 9,639 | 1982 | 9,103 | 1981 | 8,737 | 1980 | 8,477 | 1979 | 8,402 | 1978 | 8,513 | 1977 | 8,606 | 1976 | 8,622 | 1975 | 8,585 |
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