| Year | Value | | 2023 | 183,116 | | 2022 | 166,601 | | 2021 | 153,811 | | 2020 | 145,918 | | 2019 | 140,941 | | 2018 | 140,232 | | 2017 | 143,608 | | 2016 | 151,332 | | 2015 | 163,254 | | 2014 | 178,596 | | 2013 | 196,061 | | 2012 | 214,483 | | 2011 | 233,315 | | 2010 | 252,637 | | 2009 | 254,308 | | 2008 | 227,433 | | 2007 | 186,488 | | 2006 | 146,871 | | 2005 | 124,036 | | 2004 | 121,987 | | 2003 | 128,089 | | 2002 | 131,978 | | 2001 | 132,320 | | 2000 | 128,424 | | 1999 | 120,506 | | 1998 | 109,515 | | 1997 | 96,636 | | 1996 | 83,163 | | 1995 | 75,198 | | 1994 | 72,946 | | 1993 | 70,720 | | 1992 | 67,877 | | 1991 | 64,194 | | 1990 | 59,657 | | 1989 | 54,404 | | 1988 | 48,652 | | 1987 | 42,742 | | 1986 | 37,152 | | 1985 | 34,097 | | 1984 | 33,136 | | 1983 | 31,680 | | 1982 | 29,496 | | 1981 | 26,647 | | 1980 | 24,591 | | 1979 | 23,442 | | 1978 | 21,789 | | 1977 | 19,419 | | 1976 | 16,264 | | 1975 | 14,119 | | 1974 | 13,209 |
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