| Year | Value | | 2024 | 281,277 | | 2023 | 256,289 | | 2022 | 234,431 | | 2021 | 215,127 | | 2020 | 198,161 | | 2019 | 184,543 | | 2018 | 173,921 | | 2017 | 165,572 | | 2016 | 159,429 | | 2015 | 154,860 | | 2014 | 150,912 | | 2013 | 147,051 | | 2012 | 144,685 | | 2011 | 143,750 | | 2010 | 143,399 | | 2009 | 144,523 | | 2008 | 147,105 | | 2007 | 150,706 | | 2006 | 154,822 | | 2005 | 159,802 | | 2004 | 165,822 | | 2003 | 172,170 | | 2002 | 178,231 | | 2001 | 184,177 | | 2000 | 189,754 | | 1999 | 193,597 | | 1998 | 191,315 | | 1997 | 183,949 | | 1996 | 176,416 | | 1995 | 168,388 | | 1994 | 160,245 | | 1993 | 156,635 | | 1992 | 146,949 | | 1991 | 134,503 | | 1990 | 129,286 | | 1989 | 123,828 | | 1988 | 117,535 | | 1987 | 109,498 | | 1986 | 102,687 | | 1985 | 98,458 | | 1984 | 94,999 | | 1983 | 92,257 | | 1982 | 91,531 | | 1981 | 91,833 | | 1980 | 102,088 | | 1979 | 111,149 | | 1978 | 105,615 | | 1977 | 98,834 | | 1976 | 94,855 | | 1975 | 91,755 |
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