Year | Value | 2022 | 32,649 | 2021 | 32,669 | 2020 | 32,709 | 2019 | 32,685 | 2018 | 32,648 | 2017 | 32,602 | 2016 | 32,565 | 2015 | 32,520 | 2014 | 32,452 | 2013 | 32,411 | 2012 | 32,160 | 2011 | 31,701 | 2010 | 31,262 | 2009 | 30,819 | 2008 | 30,398 | 2007 | 29,996 | 2006 | 29,587 | 2005 | 29,155 | 2004 | 28,716 | 2003 | 28,301 | 2002 | 27,892 | 2001 | 27,721 | 2000 | 27,741 | 1999 | 27,695 | 1998 | 27,636 | 1997 | 27,564 | 1996 | 27,491 | 1995 | 27,412 | 1994 | 27,282 | 1993 | 27,118 | 1992 | 26,945 | 1991 | 26,988 | 1990 | 27,317 | 1989 | 27,688 | 1988 | 28,000 | 1987 | 28,272 | 1986 | 28,506 | 1985 | 28,674 | 1984 | 28,788 | 1983 | 28,855 | 1982 | 28,863 | 1981 | 28,819 | 1980 | 28,734 | 1979 | 28,618 | 1978 | 28,485 | 1977 | 28,337 | 1976 | 28,162 | 1975 | 27,973 | 1974 | 27,779 | 1973 | 27,558 | 1972 | 27,323 | 1971 | 27,069 | 1970 | 26,685 | 1969 | 26,162 | 1968 | 25,610 | 1967 | 25,047 | 1966 | 24,477 | 1965 | 23,910 | 1964 | 23,347 | 1963 | 22,796 | 1962 | 22,249 | 1961 | 21,907 | 1960 | 21,822 |
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