| Year | Value | | 2023 | 1,708,889 | | 2022 | 1,640,569 | | 2021 | 1,575,990 | | 2020 | 1,515,356 | | 2019 | 1,457,503 | | 2018 | 1,398,948 | | 2017 | 1,336,266 | | 2016 | 1,269,065 | | 2015 | 1,199,885 | | 2014 | 1,131,662 | | 2013 | 1,066,985 | | 2012 | 1,010,331 | | 2011 | 966,379 | | 2010 | 935,100 | | 2009 | 914,651 | | 2008 | 903,465 | | 2007 | 897,204 | | 2006 | 887,552 | | 2005 | 867,353 | | 2004 | 840,117 | | 2003 | 813,582 | | 2002 | 788,313 | | 2001 | 761,068 | | 2000 | 729,684 | | 1999 | 691,560 | | 1998 | 650,029 | | 1997 | 612,191 | | 1996 | 579,139 | | 1995 | 547,672 | | 1994 | 515,719 | | 1993 | 483,670 | | 1992 | 452,216 | | 1991 | 423,514 | | 1990 | 398,721 | | 1989 | 377,492 | | 1988 | 359,261 | | 1987 | 343,107 | | 1986 | 328,753 | | 1985 | 315,930 | | 1984 | 304,887 | | 1983 | 295,925 | | 1982 | 288,556 | | 1981 | 281,868 | | 1980 | 275,190 | | 1979 | 268,412 | | 1978 | 261,387 | | 1977 | 254,077 | | 1976 | 247,047 | | 1975 | 240,504 | | 1974 | 234,121 |
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