Year | Value | 2022 | 34,673 | 2021 | 34,329 | 2020 | 34,404 | 2019 | 34,343 | 2018 | 34,080 | 2017 | 34,020 | 2016 | 34,256 | 2015 | 34,667 | 2014 | 35,394 | 2013 | 36,474 | 2012 | 37,499 | 2011 | 37,933 | 2010 | 37,493 | 2009 | 36,582 | 2008 | 35,424 | 2007 | 34,138 | 2006 | 33,052 | 2005 | 32,298 | 2004 | 31,638 | 2003 | 30,942 | 2002 | 30,372 | 2001 | 30,233 | 2000 | 30,459 | 1999 | 30,500 | 1998 | 31,101 | 1997 | 33,016 | 1996 | 35,545 | 1995 | 38,729 | 1994 | 42,894 | 1993 | 47,738 | 1992 | 52,654 | 1991 | 56,439 | 1990 | 58,639 | 1989 | 59,638 | 1988 | 59,628 | 1987 | 58,927 | 1986 | 58,076 | 1985 | 57,247 | 1984 | 56,145 | 1983 | 54,930 | 1982 | 54,120 | 1981 | 53,707 | 1980 | 53,457 | 1979 | 53,458 | 1978 | 53,277 | 1977 | 52,883 | 1976 | 52,642 | 1975 | 52,612 | 1974 | 52,353 | 1973 | 51,678 | 1972 | 50,686 | 1971 | 49,190 | 1970 | 47,683 | 1969 | 46,813 | 1968 | 46,424 | 1967 | 46,457 | 1966 | 47,142 | 1965 | 47,759 | 1964 | 47,939 | 1963 | 47,833 | 1962 | 47,432 | 1961 | 46,737 | 1960 | 46,385 |
|