| Year | Value | | 2022 | 276,971 | | 2021 | 270,394 | | 2020 | 257,525 | | 2019 | 235,442 | | 2018 | 208,869 | | 2017 | 186,233 | | 2016 | 174,115 | | 2015 | 176,977 | | 2014 | 192,904 | | 2013 | 215,813 | | 2012 | 240,854 | | 2011 | 261,476 | | 2010 | 272,653 | | 2009 | 274,361 | | 2008 | 269,408 | | 2007 | 262,869 | | 2006 | 258,747 | | 2005 | 259,655 | | 2004 | 266,946 | | 2003 | 277,218 | | 2002 | 285,462 | | 2001 | 289,827 | | 2000 | 290,313 | | 1999 | 287,552 | | 1998 | 282,135 | | 1997 | 273,470 | | 1996 | 260,305 | | 1995 | 242,712 | | 1994 | 222,468 | | 1993 | 200,720 | | 1992 | 179,552 | | 1991 | 163,669 | | 1990 | 156,665 | | 1989 | 158,014 | | 1988 | 166,381 | | 1987 | 180,407 | | 1986 | 196,087 | | 1985 | 209,124 | | 1984 | 216,206 | | 1983 | 217,309 | | 1982 | 214,220 | | 1981 | 209,200 | | 1980 | 203,702 | | 1979 | 198,331 | | 1978 | 193,687 | | 1977 | 189,944 | | 1976 | 186,658 | | 1975 | 182,755 | | 1974 | 177,620 | | 1973 | 171,171 | | 1972 | 162,926 | | 1971 | 153,359 | | 1970 | 144,133 | | 1969 | 135,897 | | 1968 | 129,120 | | 1967 | 124,542 | | 1966 | 121,918 | | 1965 | 120,710 | | 1964 | 120,189 | | 1963 | 120,021 | | 1962 | 119,963 | | 1961 | 119,064 | | 1960 | 116,213 |
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