Year | Value | 2022 | 38,236 | 2021 | 38,527 | 2020 | 38,806 | 2019 | 39,049 | 2018 | 39,203 | 2017 | 39,346 | 2016 | 39,434 | 2015 | 39,385 | 2014 | 39,089 | 2013 | 38,502 | 2012 | 37,683 | 2011 | 36,710 | 2010 | 35,649 | 2009 | 34,665 | 2008 | 33,807 | 2007 | 32,459 | 2006 | 31,210 | 2005 | 30,527 | 2004 | 30,458 | 2003 | 30,888 | 2002 | 30,978 | 2001 | 30,853 | 2000 | 30,682 | 1999 | 29,720 | 1998 | 28,237 | 1997 | 27,315 | 1996 | 27,013 | 1995 | 27,136 | 1994 | 27,421 | 1993 | 27,779 | 1992 | 28,103 | 1991 | 28,302 | 1990 | 28,331 | 1989 | 28,208 | 1988 | 27,984 | 1987 | 27,682 | 1986 | 27,209 | 1985 | 26,664 | 1984 | 26,168 | 1983 | 25,634 | 1982 | 25,062 | 1981 | 24,485 | 1980 | 23,942 | 1979 | 23,466 | 1978 | 23,065 | 1977 | 22,745 | 1976 | 22,438 | 1975 | 22,131 | 1974 | 21,878 | 1973 | 21,647 | 1972 | 21,398 | 1971 | 21,086 | 1970 | 20,674 | 1969 | 20,154 | 1968 | 19,532 | 1967 | 18,834 | 1966 | 18,050 | 1965 | 17,265 | 1964 | 16,571 | 1963 | 15,950 | 1962 | 15,402 | 1961 | 14,930 | 1960 | 14,543 |
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