Year | Value | 2023 | 45,929 | 2022 | 47,792 | 2021 | 49,749 | 2020 | 51,992 | 2019 | 53,589 | 2018 | 54,233 | 2017 | 54,270 | 2016 | 53,552 | 2015 | 52,539 | 2014 | 50,542 | 2013 | 47,761 | 2012 | 46,470 | 2011 | 46,417 | 2010 | 45,835 | 2009 | 45,420 | 2008 | 44,924 | 2007 | 43,388 | 2006 | 41,437 | 2005 | 39,467 | 2004 | 37,657 | 2003 | 36,725 | 2002 | 37,011 | 2001 | 37,605 | 2000 | 37,902 | 1999 | 37,950 | 1998 | 37,785 | 1997 | 37,458 | 1996 | 37,007 | 1995 | 36,510 | 1994 | 36,064 | 1993 | 35,728 | 1992 | 35,563 | 1991 | 35,619 | 1990 | 35,486 | 1989 | 34,845 | 1988 | 33,840 | 1987 | 32,549 | 1986 | 31,005 | 1985 | 29,374 | 1984 | 27,959 | 1983 | 26,898 | 1982 | 26,207 | 1981 | 25,852 | 1980 | 25,563 | 1979 | 25,101 | 1978 | 24,459 | 1977 | 23,621 | 1976 | 22,600 | 1975 | 21,503 | 1974 | 20,520 |
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