Year | Value | 2022 | 337,809 | 2021 | 331,575 | 2020 | 327,892 | 2019 | 325,336 | 2018 | 323,826 | 2017 | 324,076 | 2016 | 324,640 | 2015 | 323,797 | 2014 | 323,038 | 2013 | 324,348 | 2012 | 327,024 | 2011 | 330,311 | 2010 | 331,517 | 2009 | 332,803 | 2008 | 332,316 | 2007 | 329,131 | 2006 | 324,045 | 2005 | 318,323 | 2004 | 313,505 | 2003 | 310,466 | 2002 | 309,179 | 2001 | 309,769 | 2000 | 312,171 | 1999 | 315,276 | 1998 | 317,235 | 1997 | 317,488 | 1996 | 315,974 | 1995 | 313,627 | 1994 | 312,291 | 1993 | 313,832 | 1992 | 318,828 | 1991 | 326,977 | 1990 | 337,194 | 1989 | 346,937 | 1988 | 353,827 | 1987 | 358,996 | 1986 | 364,373 | 1985 | 370,846 | 1984 | 379,900 | 1983 | 390,270 | 1982 | 398,625 | 1981 | 404,748 | 1980 | 408,069 | 1979 | 408,139 | 1978 | 407,052 | 1977 | 405,528 | 1976 | 402,328 | 1975 | 397,621 | 1974 | 391,977 | 1973 | 385,647 | 1972 | 379,989 | 1971 | 374,364 | 1970 | 370,186 | 1969 | 367,444 | 1968 | 365,269 | 1967 | 364,044 | 1966 | 364,472 | 1965 | 360,239 | 1964 | 349,179 | 1963 | 336,271 | 1962 | 318,885 | 1961 | 296,433 | 1960 | 279,652 |
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