| Year | Value | | 2024 | 530,404 | | 2023 | 496,153 | | 2022 | 477,296 | | 2021 | 469,221 | | 2020 | 467,461 | | 2019 | 470,423 | | 2018 | 475,646 | | 2017 | 481,512 | | 2016 | 496,332 | | 2015 | 523,437 | | 2014 | 554,648 | | 2013 | 585,413 | | 2012 | 611,313 | | 2011 | 621,197 | | 2010 | 611,429 | | 2009 | 591,802 | | 2008 | 567,814 | | 2007 | 541,540 | | 2006 | 509,019 | | 2005 | 477,362 | | 2004 | 451,424 | | 2003 | 424,807 | | 2002 | 399,750 | | 2001 | 380,828 | | 2000 | 369,625 | | 1999 | 361,040 | | 1998 | 349,364 | | 1997 | 337,206 | | 1996 | 328,273 | | 1995 | 322,889 | | 1994 | 324,614 | | 1993 | 333,245 | | 1992 | 345,765 | | 1991 | 345,866 | | 1990 | 332,708 | | 1989 | 321,302 | | 1988 | 312,566 | | 1987 | 307,774 | | 1986 | 302,381 | | 1985 | 294,560 | | 1984 | 287,320 | | 1983 | 280,591 | | 1982 | 270,841 | | 1981 | 259,747 | | 1980 | 223,067 | | 1979 | 193,471 | | 1978 | 200,484 | | 1977 | 203,780 | | 1976 | 197,345 | | 1975 | 187,098 |
|