| Year | Value | | 2022 | 291,382 | | 2021 | 273,035 | | 2020 | 251,697 | | 2019 | 222,059 | | 2018 | 192,104 | | 2017 | 171,341 | | 2016 | 166,177 | | 2015 | 177,939 | | 2014 | 202,217 | | 2013 | 230,946 | | 2012 | 254,395 | | 2011 | 265,789 | | 2010 | 262,885 | | 2009 | 247,728 | | 2008 | 223,548 | | 2007 | 198,600 | | 2006 | 179,289 | | 2005 | 168,692 | | 2004 | 170,241 | | 2003 | 180,945 | | 2002 | 194,328 | | 2001 | 205,751 | | 2000 | 212,445 | | 1999 | 212,418 | | 1998 | 207,475 | | 1997 | 199,292 | | 1996 | 186,400 | | 1995 | 172,718 | | 1994 | 162,122 | | 1993 | 153,232 | | 1992 | 146,565 | | 1991 | 144,261 | | 1990 | 145,459 | | 1989 | 150,290 | | 1988 | 161,528 | | 1987 | 171,795 | | 1986 | 182,986 | | 1985 | 189,732 | | 1984 | 190,988 | | 1983 | 186,873 | | 1982 | 178,345 | | 1981 | 169,579 | | 1980 | 163,405 | | 1979 | 159,323 | | 1978 | 156,817 | | 1977 | 155,582 | | 1976 | 153,278 | | 1975 | 147,973 | | 1974 | 139,941 | | 1973 | 129,962 | | 1972 | 118,551 | | 1971 | 107,705 | | 1970 | 98,826 | | 1969 | 91,446 | | 1968 | 85,117 | | 1967 | 80,266 | | 1966 | 76,974 | | 1965 | 75,250 | | 1964 | 75,313 | | 1963 | 77,513 | | 1962 | 81,083 | | 1961 | 84,125 | | 1960 | 85,334 |
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