Year | Value | 2022 | 345,150 | 2021 | 335,829 | 2020 | 326,916 | 2019 | 317,250 | 2018 | 310,540 | 2017 | 305,123 | 2016 | 295,915 | 2015 | 278,896 | 2014 | 253,689 | 2013 | 225,051 | 2012 | 200,805 | 2011 | 188,135 | 2010 | 191,962 | 2009 | 209,850 | 2008 | 235,122 | 2007 | 262,615 | 2006 | 285,128 | 2005 | 297,569 | 2004 | 299,980 | 2003 | 295,671 | 2002 | 290,528 | 2001 | 288,052 | 2000 | 290,517 | 1999 | 299,817 | 1998 | 312,002 | 1997 | 321,242 | 1996 | 326,064 | 1995 | 327,101 | 1994 | 324,882 | 1993 | 319,587 | 1992 | 310,035 | 1991 | 295,201 | 1990 | 275,902 | 1989 | 253,484 | 1988 | 229,246 | 1987 | 205,804 | 1986 | 187,772 | 1985 | 179,708 | 1984 | 181,193 | 1983 | 190,581 | 1982 | 205,957 | 1981 | 223,264 | 1980 | 237,323 | 1979 | 244,920 | 1978 | 245,834 | 1977 | 242,156 | 1976 | 236,766 | 1975 | 231,119 | 1974 | 225,436 | 1973 | 220,351 | 1972 | 216,349 | 1971 | 212,953 | 1970 | 208,900 | 1969 | 203,585 | 1968 | 196,877 | 1967 | 188,130 | 1966 | 177,950 | 1965 | 168,357 | 1964 | 160,128 | 1963 | 153,817 | 1962 | 150,217 | 1961 | 149,070 | 1960 | 149,780 |
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