| Year | Value | | 2024 | 558,047 | | 2023 | 584,569 | | 2022 | 608,929 | | 2021 | 617,483 | | 2020 | 606,342 | | 2019 | 587,300 | | 2018 | 565,547 | | 2017 | 542,067 | | 2016 | 515,209 | | 2015 | 488,709 | | 2014 | 463,235 | | 2013 | 435,559 | | 2012 | 409,246 | | 2011 | 384,042 | | 2010 | 358,871 | | 2009 | 336,860 | | 2008 | 317,781 | | 2007 | 299,592 | | 2006 | 280,828 | | 2005 | 263,441 | | 2004 | 249,364 | | 2003 | 237,215 | | 2002 | 227,592 | | 2001 | 222,678 | | 2000 | 222,719 | | 1999 | 224,688 | | 1998 | 225,984 | | 1997 | 227,354 | | 1996 | 229,948 | | 1995 | 233,754 | | 1994 | 240,390 | | 1993 | 249,243 | | 1992 | 262,362 | | 1991 | 268,458 | | 1990 | 263,117 | | 1989 | 256,385 | | 1988 | 243,996 | | 1987 | 228,982 | | 1986 | 214,297 | | 1985 | 198,180 | | 1984 | 183,080 | | 1983 | 174,389 | | 1982 | 168,953 | | 1981 | 161,419 | | 1980 | 143,488 | | 1979 | 128,455 | | 1978 | 129,696 | | 1977 | 131,334 | | 1976 | 129,328 | | 1975 | 126,192 |
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