| Year | Value | | 2023 | 254,365 | | 2022 | 247,738 | | 2021 | 240,550 | | 2020 | 232,506 | | 2019 | 223,831 | | 2018 | 215,010 | | 2017 | 206,474 | | 2016 | 198,480 | | 2015 | 191,394 | | 2014 | 185,601 | | 2013 | 180,906 | | 2012 | 176,979 | | 2011 | 173,775 | | 2010 | 171,470 | | 2009 | 170,040 | | 2008 | 169,361 | | 2007 | 169,149 | | 2006 | 169,084 | | 2005 | 168,815 | | 2004 | 168,102 | | 2003 | 166,802 | | 2002 | 164,968 | | 2001 | 162,186 | | 2000 | 157,959 | | 1999 | 152,705 | | 1998 | 146,935 | | 1997 | 141,036 | | 1996 | 135,311 | | 1995 | 129,841 | | 1994 | 124,624 | | 1993 | 119,643 | | 1992 | 114,887 | | 1991 | 110,371 | | 1990 | 106,124 | | 1989 | 102,223 | | 1988 | 98,539 | | 1987 | 94,761 | | 1986 | 91,036 | | 1985 | 87,660 | | 1984 | 84,588 | | 1983 | 81,845 | | 1982 | 79,595 | | 1981 | 77,323 | | 1980 | 74,412 | | 1979 | 70,995 | | 1978 | 67,498 | | 1977 | 64,221 | | 1976 | 61,362 | | 1975 | 59,127 | | 1974 | 57,375 |
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