| Year | Value | | 2022 | 130,710 | | 2021 | 130,596 | | 2020 | 135,036 | | 2019 | 134,302 | | 2018 | 134,053 | | 2017 | 134,514 | | 2016 | 135,404 | | 2015 | 135,378 | | 2014 | 135,878 | | 2013 | 136,837 | | 2012 | 138,621 | | 2011 | 141,635 | | 2010 | 145,792 | | 2009 | 149,327 | | 2008 | 151,481 | | 2007 | 153,028 | | 2006 | 154,208 | | 2005 | 155,158 | | 2004 | 156,637 | | 2003 | 158,608 | | 2002 | 160,011 | | 2001 | 161,316 | | 2000 | 169,340 | | 1999 | 172,646 | | 1998 | 174,367 | | 1997 | 175,678 | | 1996 | 175,905 | | 1995 | 175,422 | | 1994 | 174,572 | | 1993 | 171,115 | | 1992 | 166,572 | | 1991 | 167,107 | | 1990 | 163,654 | | 1989 | 151,906 | | 1988 | 142,793 | | 1987 | 137,652 | | 1986 | 135,221 | | 1985 | 137,296 | | 1984 | 143,319 | | 1983 | 148,740 | | 1982 | 152,718 | | 1981 | 156,187 | | 1980 | 159,804 | | 1979 | 163,503 | | 1978 | 166,932 | | 1977 | 169,838 | | 1976 | 172,137 | | 1975 | 174,000 | | 1974 | 175,026 | | 1973 | 174,611 | | 1972 | 173,085 | | 1971 | 171,052 | | 1970 | 168,972 | | 1969 | 167,186 | | 1968 | 165,875 | | 1967 | 164,984 | | 1966 | 163,899 | | 1965 | 161,306 | | 1964 | 155,468 | | 1963 | 145,189 | | 1962 | 130,850 | | 1961 | 115,266 | | 1960 | 103,231 |
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