Year | Value | 2022 | 325,624 | 2021 | 327,676 | 2020 | 331,791 | 2019 | 336,713 | 2018 | 337,670 | 2017 | 331,932 | 2016 | 321,591 | 2015 | 310,089 | 2014 | 299,324 | 2013 | 291,568 | 2012 | 288,388 | 2011 | 288,137 | 2010 | 288,828 | 2009 | 288,625 | 2008 | 288,163 | 2007 | 287,706 | 2006 | 286,517 | 2005 | 287,108 | 2004 | 291,355 | 2003 | 297,843 | 2002 | 305,194 | 2001 | 313,532 | 2000 | 320,907 | 1999 | 325,110 | 1998 | 324,702 | 1997 | 318,465 | 1996 | 305,966 | 1995 | 289,033 | 1994 | 271,467 | 1993 | 255,532 | 1992 | 242,751 | 1991 | 234,477 | 1990 | 228,828 | 1989 | 222,465 | 1988 | 216,232 | 1987 | 212,970 | 1986 | 212,394 | 1985 | 214,032 | 1984 | 217,093 | 1983 | 221,206 | 1982 | 225,103 | 1981 | 228,016 | 1980 | 231,595 | 1979 | 236,164 | 1978 | 241,109 | 1977 | 246,406 | 1976 | 253,695 | 1975 | 263,197 | 1974 | 268,105 | 1973 | 267,433 | 1972 | 266,814 | 1971 | 263,739 | 1970 | 255,737 | 1969 | 251,701 | 1968 | 254,406 | 1967 | 257,401 | 1966 | 259,802 | 1965 | 261,477 | 1964 | 262,742 | 1963 | 263,446 | 1962 | 262,843 | 1961 | 261,263 | 1960 | 259,472 |
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