| Year | Value | | 2022 | 725,422 | | 2021 | 716,641 | | 2020 | 704,399 | | 2019 | 686,622 | | 2018 | 663,464 | | 2017 | 636,145 | | 2016 | 606,672 | | 2015 | 577,335 | | 2014 | 549,064 | | 2013 | 523,162 | | 2012 | 499,369 | | 2011 | 476,529 | | 2010 | 449,464 | | 2009 | 416,206 | | 2008 | 381,303 | | 2007 | 346,855 | | 2006 | 313,624 | | 2005 | 282,678 | | 2004 | 263,141 | | 2003 | 255,798 | | 2002 | 252,949 | | 2001 | 254,516 | | 2000 | 258,889 | | 1999 | 265,245 | | 1998 | 274,732 | | 1997 | 283,911 | | 1996 | 290,770 | | 1995 | 294,706 | | 1994 | 295,978 | | 1993 | 292,607 | | 1992 | 285,924 | | 1991 | 281,520 | | 1990 | 282,040 | | 1989 | 286,199 | | 1988 | 292,917 | | 1987 | 300,601 | | 1986 | 302,411 | | 1985 | 294,398 | | 1984 | 277,611 | | 1983 | 252,458 | | 1982 | 221,254 | | 1981 | 191,195 | | 1980 | 166,794 | | 1979 | 147,043 | | 1978 | 130,832 | | 1977 | 119,080 | | 1976 | 110,652 | | 1975 | 104,947 | | 1974 | 102,928 | | 1973 | 105,215 | | 1972 | 110,156 | | 1971 | 115,357 | | 1970 | 119,266 | | 1969 | 121,695 | | 1968 | 122,703 | | 1967 | 122,735 | | 1966 | 123,392 | | 1965 | 125,550 | | 1964 | 128,772 | | 1963 | 132,660 | | 1962 | 137,138 | | 1961 | 141,486 | | 1960 | 145,312 |
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