Year | Value | 2022 | 52,848 | 2021 | 52,440 | 2020 | 52,093 | 2019 | 51,994 | 2018 | 52,169 | 2017 | 52,383 | 2016 | 52,614 | 2015 | 52,915 | 2014 | 53,267 | 2013 | 53,607 | 2012 | 53,922 | 2011 | 54,081 | 2010 | 54,070 | 2009 | 54,051 | 2008 | 54,069 | 2007 | 54,053 | 2006 | 53,893 | 2005 | 53,618 | 2004 | 53,323 | 2003 | 53,013 | 2002 | 52,712 | 2001 | 52,427 | 2000 | 52,142 | 1999 | 51,849 | 1998 | 51,547 | 1997 | 51,228 | 1996 | 50,995 | 1995 | 50,852 | 1994 | 50,698 | 1993 | 50,538 | 1992 | 50,370 | 1991 | 50,191 | 1990 | 49,999 | 1989 | 49,780 | 1988 | 49,523 | 1987 | 49,220 | 1986 | 49,081 | 1985 | 49,138 | 1984 | 49,194 | 1983 | 49,249 | 1982 | 49,300 | 1981 | 49,328 | 1980 | 49,327 | 1979 | 49,291 | 1978 | 49,217 | 1977 | 49,092 | 1976 | 48,656 | 1975 | 47,914 | 1974 | 47,156 | 1973 | 46,458 | 1972 | 45,815 | 1971 | 45,152 | 1970 | 44,459 | 1969 | 43,731 | 1968 | 42,962 | 1967 | 42,115 | 1966 | 41,112 | 1965 | 39,992 | 1964 | 38,859 | 1963 | 37,747 | 1962 | 36,663 | 1961 | 35,604 | 1960 | 34,564 |
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