| Year | Value | | 2022 | 479,011 | | 2021 | 457,036 | | 2020 | 436,522 | | 2019 | 418,468 | | 2018 | 404,349 | | 2017 | 394,234 | | 2016 | 387,149 | | 2015 | 382,618 | | 2014 | 379,602 | | 2013 | 376,385 | | 2012 | 372,618 | | 2011 | 368,266 | | 2010 | 362,927 | | 2009 | 356,830 | | 2008 | 350,291 | | 2007 | 342,794 | | 2006 | 334,130 | | 2005 | 324,434 | | 2004 | 314,799 | | 2003 | 306,101 | | 2002 | 296,729 | | 2001 | 286,268 | | 2000 | 276,181 | | 1999 | 266,088 | | 1998 | 255,580 | | 1997 | 246,616 | | 1996 | 239,197 | | 1995 | 231,854 | | 1994 | 221,253 | | 1993 | 210,040 | | 1992 | 203,724 | | 1991 | 199,813 | | 1990 | 195,430 | | 1989 | 190,976 | | 1988 | 188,243 | | 1987 | 188,214 | | 1986 | 187,770 | | 1985 | 186,258 | | 1984 | 185,744 | | 1983 | 184,793 | | 1982 | 182,917 | | 1981 | 180,128 | | 1980 | 177,325 | | 1979 | 175,107 | | 1978 | 173,162 | | 1977 | 171,257 | | 1976 | 168,815 | | 1975 | 165,912 | | 1974 | 162,845 | | 1973 | 159,504 | | 1972 | 155,819 | | 1971 | 151,544 | | 1970 | 146,961 | | 1969 | 142,935 | | 1968 | 139,490 | | 1967 | 136,111 | | 1966 | 132,919 | | 1965 | 129,785 | | 1964 | 126,819 | | 1963 | 124,315 | | 1962 | 121,943 | | 1961 | 119,676 | | 1960 | 117,310 |
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