Year | Value | 2022 | 45,082 | 2021 | 44,274 | 2020 | 44,151 | 2019 | 44,147 | 2018 | 44,229 | 2017 | 44,388 | 2016 | 44,704 | 2015 | 45,159 | 2014 | 45,488 | 2013 | 45,647 | 2012 | 45,477 | 2011 | 44,907 | 2010 | 44,391 | 2009 | 44,312 | 2008 | 44,638 | 2007 | 45,548 | 2006 | 47,214 | 2005 | 49,044 | 2004 | 50,474 | 2003 | 51,583 | 2002 | 52,342 | 2001 | 52,566 | 2000 | 52,699 | 1999 | 52,353 | 1998 | 51,866 | 1997 | 52,065 | 1996 | 52,607 | 1995 | 52,987 | 1994 | 53,563 | 1993 | 54,774 | 1992 | 55,831 | 1991 | 55,712 | 1990 | 53,848 | 1989 | 50,534 | 1988 | 46,968 | 1987 | 44,720 | 1986 | 44,939 | 1985 | 46,921 | 1984 | 49,774 | 1983 | 53,365 | 1982 | 56,413 | 1981 | 57,210 | 1980 | 56,664 | 1979 | 55,682 | 1978 | 54,037 | 1977 | 52,912 | 1976 | 52,607 | 1975 | 53,179 | 1974 | 54,500 | 1973 | 56,102 | 1972 | 56,977 | 1971 | 56,954 | 1970 | 56,568 | 1969 | 56,059 | 1968 | 55,356 | 1967 | 54,412 | 1966 | 53,044 | 1965 | 50,565 | 1964 | 47,143 | 1963 | 43,576 | 1962 | 39,627 | 1961 | 36,097 | 1960 | 34,687 |
|