| Year | Value | | 2024 | 760,978 | | 2023 | 720,562 | | 2022 | 684,719 | | 2021 | 653,216 | | 2020 | 625,129 | | 2019 | 597,688 | | 2018 | 571,104 | | 2017 | 545,637 | | 2016 | 520,284 | | 2015 | 495,318 | | 2014 | 470,574 | | 2013 | 446,153 | | 2012 | 422,315 | | 2011 | 399,333 | | 2010 | 377,864 | | 2009 | 357,741 | | 2008 | 338,899 | | 2007 | 321,371 | | 2006 | 304,894 | | 2005 | 289,283 | | 2004 | 275,185 | | 2003 | 262,680 | | 2002 | 250,991 | | 2001 | 239,989 | | 2000 | 229,609 | | 1999 | 221,926 | | 1998 | 218,145 | | 1997 | 217,576 | | 1996 | 219,322 | | 1995 | 221,638 | | 1994 | 222,152 | | 1993 | 219,964 | | 1992 | 215,690 | | 1991 | 210,325 | | 1990 | 205,468 | | 1989 | 201,202 | | 1988 | 197,315 | | 1987 | 193,590 | | 1986 | 189,870 | | 1985 | 185,826 | | 1984 | 181,481 | | 1983 | 177,210 | | 1982 | 172,963 | | 1981 | 168,909 | | 1980 | 165,114 | | 1979 | 161,443 | | 1978 | 157,753 | | 1977 | 154,095 | | 1976 | 150,544 | | 1975 | 147,135 |
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