| Year | Value | | 2024 | 589,409 | | 2023 | 581,342 | | 2022 | 573,238 | | 2021 | 565,118 | | 2020 | 556,871 | | 2019 | 548,432 | | 2018 | 539,850 | | 2017 | 531,163 | | 2016 | 522,406 | | 2015 | 513,575 | | 2014 | 504,618 | | 2013 | 495,528 | | 2012 | 486,361 | | 2011 | 477,148 | | 2010 | 467,876 | | 2009 | 458,393 | | 2008 | 448,868 | | 2007 | 439,631 | | 2006 | 430,122 | | 2005 | 421,709 | | 2004 | 415,093 | | 2003 | 408,733 | | 2002 | 399,740 | | 2001 | 387,616 | | 2000 | 375,649 | | 1999 | 364,134 | | 1998 | 351,730 | | 1997 | 337,988 | | 1996 | 326,278 | | 1995 | 318,673 | | 1994 | 315,535 | | 1993 | 309,317 | | 1992 | 315,181 | | 1991 | 317,642 | | 1990 | 291,702 | | 1989 | 263,468 | | 1988 | 243,964 | | 1987 | 228,844 | | 1986 | 214,759 | | 1985 | 202,885 | | 1984 | 193,531 | | 1983 | 186,254 | | 1982 | 179,898 | | 1981 | 172,959 | | 1980 | 164,301 | | 1979 | 153,584 | | 1978 | 141,261 | | 1977 | 128,461 | | 1976 | 116,434 | | 1975 | 105,943 |
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