Year | Value | 2022 | 48,179 | 2021 | 47,298 | 2020 | 47,019 | 2019 | 46,723 | 2018 | 46,342 | 2017 | 46,037 | 2016 | 46,018 | 2015 | 46,253 | 2014 | 46,270 | 2013 | 46,119 | 2012 | 45,476 | 2011 | 44,467 | 2010 | 43,546 | 2009 | 43,065 | 2008 | 43,108 | 2007 | 43,941 | 2006 | 45,428 | 2005 | 46,960 | 2004 | 48,199 | 2003 | 49,089 | 2002 | 49,564 | 2001 | 49,612 | 2000 | 49,681 | 1999 | 48,838 | 1998 | 47,927 | 1997 | 48,148 | 1996 | 48,697 | 1995 | 49,203 | 1994 | 49,938 | 1993 | 51,079 | 1992 | 52,058 | 1991 | 51,960 | 1990 | 50,096 | 1989 | 46,848 | 1988 | 43,533 | 1987 | 41,571 | 1986 | 41,820 | 1985 | 43,749 | 1984 | 46,538 | 1983 | 49,876 | 1982 | 52,515 | 1981 | 52,986 | 1980 | 52,393 | 1979 | 51,456 | 1978 | 49,864 | 1977 | 48,742 | 1976 | 48,525 | 1975 | 49,121 | 1974 | 50,200 | 1973 | 51,344 | 1972 | 51,960 | 1971 | 51,195 | 1970 | 48,805 | 1969 | 45,677 | 1968 | 42,423 | 1967 | 38,840 | 1966 | 35,599 | 1965 | 33,225 | 1964 | 31,042 | 1963 | 29,118 | 1962 | 27,100 | 1961 | 25,236 | 1960 | 24,571 |
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