| Year | Value | | 2022 | 145,363 | | 2021 | 145,678 | | 2020 | 145,249 | | 2019 | 144,668 | | 2018 | 141,884 | | 2017 | 137,114 | | 2016 | 130,536 | | 2015 | 122,936 | | 2014 | 115,347 | | 2013 | 108,331 | | 2012 | 102,166 | | 2011 | 97,224 | | 2010 | 93,414 | | 2009 | 89,633 | | 2008 | 85,304 | | 2007 | 80,697 | | 2006 | 74,722 | | 2005 | 66,060 | | 2004 | 55,604 | | 2003 | 46,049 | | 2002 | 40,193 | | 2001 | 39,769 | | 2000 | 45,153 | | 1999 | 54,798 | | 1998 | 65,435 | | 1997 | 73,876 | | 1996 | 78,546 | | 1995 | 79,365 | | 1994 | 77,539 | | 1993 | 76,185 | | 1992 | 75,992 | | 1991 | 75,709 | | 1990 | 77,115 | | 1989 | 80,421 | | 1988 | 83,791 | | 1987 | 86,245 | | 1986 | 86,777 | | 1985 | 85,213 | | 1984 | 81,904 | | 1983 | 77,123 | | 1982 | 71,217 | | 1981 | 65,216 | | 1980 | 59,909 | | 1979 | 55,106 | | 1978 | 50,494 | | 1977 | 46,670 | | 1976 | 44,170 | | 1975 | 43,229 | | 1974 | 43,870 | | 1973 | 46,308 | | 1972 | 49,884 | | 1971 | 52,957 | | 1970 | 54,714 | | 1969 | 55,137 | | 1968 | 54,031 | | 1967 | 51,888 | | 1966 | 50,102 | | 1965 | 49,411 | | 1964 | 49,743 | | 1963 | 50,838 | | 1962 | 52,406 | | 1961 | 53,246 | | 1960 | 52,437 |
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