Year | Value | 2022 | 313,700 | 2021 | 315,822 | 2020 | 315,098 | 2019 | 314,331 | 2018 | 312,144 | 2017 | 308,958 | 2016 | 308,829 | 2015 | 309,889 | 2014 | 310,686 | 2013 | 310,549 | 2012 | 309,646 | 2011 | 307,462 | 2010 | 304,109 | 2009 | 299,833 | 2008 | 294,652 | 2007 | 288,815 | 2006 | 282,925 | 2005 | 277,771 | 2004 | 274,179 | 2003 | 272,122 | 2002 | 271,554 | 2001 | 272,079 | 2000 | 272,530 | 1999 | 272,374 | 1998 | 271,961 | 1997 | 271,628 | 1996 | 272,022 | 1995 | 273,575 | 1994 | 275,811 | 1993 | 277,772 | 1992 | 278,697 | 1991 | 278,590 | 1990 | 278,626 | 1989 | 277,862 | 1988 | 275,241 | 1987 | 271,118 | 1986 | 264,739 | 1985 | 256,138 | 1984 | 247,248 | 1983 | 238,443 | 1982 | 228,940 | 1981 | 219,723 | 1980 | 210,931 | 1979 | 201,833 | 1978 | 193,177 | 1977 | 185,892 | 1976 | 179,199 | 1975 | 172,939 | 1974 | 167,886 | 1973 | 163,416 | 1972 | 158,688 | 1971 | 153,912 | 1970 | 149,682 | 1969 | 146,707 | 1968 | 144,667 | 1967 | 143,145 | 1966 | 142,161 | 1965 | 141,702 | 1964 | 141,669 | 1963 | 141,980 | 1962 | 142,560 | 1961 | 143,181 | 1960 | 143,430 |
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