| Year | Value | | 2022 | 223,991 | | 2021 | 224,785 | | 2020 | 220,148 | | 2019 | 209,656 | | 2018 | 200,035 | | 2017 | 194,630 | | 2016 | 192,786 | | 2015 | 193,814 | | 2014 | 197,523 | | 2013 | 202,734 | | 2012 | 207,916 | | 2011 | 212,211 | | 2010 | 216,261 | | 2009 | 218,588 | | 2008 | 219,820 | | 2007 | 219,940 | | 2006 | 218,745 | | 2005 | 216,407 | | 2004 | 213,076 | | 2003 | 209,284 | | 2002 | 205,595 | | 2001 | 201,516 | | 2000 | 197,587 | | 1999 | 193,790 | | 1998 | 188,953 | | 1997 | 183,260 | | 1996 | 176,729 | | 1995 | 167,921 | | 1994 | 157,914 | | 1993 | 141,833 | | 1992 | 123,407 | | 1991 | 104,589 | | 1990 | 90,687 | | 1989 | 84,907 | | 1988 | 87,536 | | 1987 | 97,162 | | 1986 | 110,181 | | 1985 | 122,407 | | 1984 | 131,697 | | 1983 | 136,886 | | 1982 | 138,464 | | 1981 | 137,750 | | 1980 | 136,461 | | 1979 | 136,247 | | 1978 | 136,478 | | 1977 | 136,737 | | 1976 | 136,690 | | 1975 | 135,171 | | 1974 | 131,838 | | 1973 | 126,181 | | 1972 | 117,751 | | 1971 | 106,538 | | 1970 | 93,932 | | 1969 | 81,435 | | 1968 | 69,778 | | 1967 | 60,171 | | 1966 | 53,140 | | 1965 | 48,736 | | 1964 | 47,222 | | 1963 | 48,001 | | 1962 | 50,037 | | 1961 | 51,352 | | 1960 | 53,072 |
|