Year | Value | 2022 | 332,886 | 2021 | 336,682 | 2020 | 338,423 | 2019 | 336,437 | 2018 | 334,004 | 2017 | 334,261 | 2016 | 335,888 | 2015 | 339,344 | 2014 | 344,357 | 2013 | 346,170 | 2012 | 341,567 | 2011 | 332,348 | 2010 | 321,161 | 2009 | 309,834 | 2008 | 301,293 | 2007 | 297,072 | 2006 | 296,084 | 2005 | 296,712 | 2004 | 296,886 | 2003 | 296,938 | 2002 | 297,062 | 2001 | 296,169 | 2000 | 296,924 | 1999 | 301,534 | 1998 | 308,293 | 1997 | 316,287 | 1996 | 326,106 | 1995 | 335,325 | 1994 | 340,825 | 1993 | 341,197 | 1992 | 335,760 | 1991 | 323,123 | 1990 | 304,852 | 1989 | 285,579 | 1988 | 268,029 | 1987 | 253,561 | 1986 | 243,710 | 1985 | 237,233 | 1984 | 230,422 | 1983 | 223,743 | 1982 | 219,796 | 1981 | 218,486 | 1980 | 219,042 | 1979 | 220,902 | 1978 | 224,051 | 1977 | 227,143 | 1976 | 229,670 | 1975 | 233,345 | 1974 | 238,407 | 1973 | 244,496 | 1972 | 251,423 | 1971 | 260,108 | 1970 | 270,226 | 1969 | 275,011 | 1968 | 274,049 | 1967 | 273,122 | 1966 | 269,881 | 1965 | 261,769 | 1964 | 257,874 | 1963 | 261,066 | 1962 | 264,602 | 1961 | 267,560 | 1960 | 270,599 |
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