Year | Value | 2022 | 47,910 | 2021 | 46,625 | 2020 | 46,019 | 2019 | 45,282 | 2018 | 44,425 | 2017 | 43,894 | 2016 | 43,817 | 2015 | 43,890 | 2014 | 44,035 | 2013 | 44,384 | 2012 | 44,818 | 2011 | 45,431 | 2010 | 46,131 | 2009 | 46,667 | 2008 | 46,890 | 2007 | 46,680 | 2006 | 46,138 | 2005 | 45,725 | 2004 | 45,673 | 2003 | 46,018 | 2002 | 46,963 | 2001 | 48,603 | 2000 | 50,373 | 1999 | 51,130 | 1998 | 51,686 | 1997 | 52,680 | 1996 | 53,315 | 1995 | 54,049 | 1994 | 55,169 | 1993 | 56,374 | 1992 | 57,950 | 1991 | 59,154 | 1990 | 58,961 | 1989 | 58,481 | 1988 | 58,312 | 1987 | 57,728 | 1986 | 56,420 | 1985 | 54,122 | 1984 | 50,747 | 1983 | 47,218 | 1982 | 44,951 | 1981 | 45,191 | 1980 | 47,200 | 1979 | 50,065 | 1978 | 53,614 | 1977 | 56,578 | 1976 | 57,299 | 1975 | 56,721 | 1974 | 55,610 | 1973 | 53,901 | 1972 | 52,790 | 1971 | 52,455 | 1970 | 52,973 | 1969 | 54,256 | 1968 | 55,843 | 1967 | 56,745 | 1966 | 56,962 | 1965 | 56,754 | 1964 | 56,222 | 1963 | 55,382 | 1962 | 54,358 | 1961 | 52,853 | 1960 | 50,491 |
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