Year | Value | 2022 | 284,304 | 2021 | 281,831 | 2020 | 278,909 | 2019 | 280,436 | 2018 | 285,856 | 2017 | 294,747 | 2016 | 305,722 | 2015 | 318,165 | 2014 | 330,290 | 2013 | 341,921 | 2012 | 356,819 | 2011 | 374,067 | 2010 | 389,373 | 2009 | 401,030 | 2008 | 408,900 | 2007 | 410,777 | 2006 | 407,405 | 2005 | 401,672 | 2004 | 394,976 | 2003 | 389,510 | 2002 | 384,533 | 2001 | 378,610 | 2000 | 374,487 | 1999 | 372,431 | 1998 | 369,822 | 1997 | 366,938 | 1996 | 363,680 | 1995 | 360,245 | 1994 | 355,808 | 1993 | 350,714 | 1992 | 347,846 | 1991 | 346,348 | 1990 | 344,350 | 1989 | 342,443 | 1988 | 339,640 | 1987 | 335,391 | 1986 | 332,503 | 1985 | 330,349 | 1984 | 327,068 | 1983 | 324,269 | 1982 | 319,559 | 1981 | 310,609 | 1980 | 300,534 | 1979 | 290,303 | 1978 | 279,537 | 1977 | 270,213 | 1976 | 261,249 | 1975 | 249,482 | 1974 | 238,950 | 1973 | 236,027 | 1972 | 238,838 | 1971 | 245,825 | 1970 | 255,058 | 1969 | 265,909 | 1968 | 276,487 | 1967 | 285,328 | 1966 | 293,285 | 1965 | 300,505 | 1964 | 305,793 | 1963 | 307,727 | 1962 | 306,904 | 1961 | 305,121 | 1960 | 305,587 |
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