Year | Value | 2022 | 313,667 | 2021 | 310,728 | 2020 | 309,368 | 2019 | 310,661 | 2018 | 313,813 | 2017 | 317,068 | 2016 | 319,710 | 2015 | 320,316 | 2014 | 317,985 | 2013 | 315,871 | 2012 | 316,774 | 2011 | 319,464 | 2010 | 323,464 | 2009 | 328,260 | 2008 | 329,713 | 2007 | 324,921 | 2006 | 315,984 | 2005 | 305,872 | 2004 | 296,086 | 2003 | 289,057 | 2002 | 286,247 | 2001 | 286,081 | 2000 | 287,035 | 1999 | 287,690 | 1998 | 288,444 | 1997 | 289,268 | 1996 | 289,388 | 1995 | 290,842 | 1994 | 294,993 | 1993 | 301,147 | 1992 | 308,739 | 1991 | 317,474 | 1990 | 324,864 | 1989 | 328,406 | 1988 | 327,142 | 1987 | 320,252 | 1986 | 307,129 | 1985 | 289,801 | 1984 | 272,725 | 1983 | 257,663 | 1982 | 245,253 | 1981 | 237,242 | 1980 | 232,068 | 1979 | 226,269 | 1978 | 220,430 | 1977 | 217,241 | 1976 | 216,543 | 1975 | 218,051 | 1974 | 221,072 | 1973 | 225,389 | 1972 | 229,800 | 1971 | 233,244 | 1970 | 236,691 | 1969 | 240,648 | 1968 | 245,645 | 1967 | 251,707 | 1966 | 259,574 | 1965 | 269,261 | 1964 | 274,159 | 1963 | 273,215 | 1962 | 272,048 | 1961 | 268,471 | 1960 | 260,995 |
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