Year | Value | 2021 | 54,700 | 2020 | 54,200 | 2019 | 53,300 | 2018 | 54,480 | 2017 | 55,900 | 2016 | 55,160 | 2015 | 57,890 | 2014 | 54,750 | 2013 | 75,130 | 2012 | 75,069 | 2011 | 73,461 | 2010 | 74,977 | 2009 | 75,344 | 2008 | 74,450 | 2007 | 74,120 | 2006 | 74,440 | 2005 | 75,000 | 2004 | 75,270 | 2003 | 72,500 | 2002 | 74,900 | 2001 | 77,850 | 2000 | 80,660 | 1999 | 80,750 | 1998 | 80,270 | 1997 | 80,120 | 1996 | 79,870 | 1995 | 81,080 | 1994 | 81,290 | 1993 | 79,750 | 1992 | 79,530 | 1991 | 79,140 | 1990 | 78,460 | 1989 | 77,530 | 1988 | 77,260 | 1987 | 77,210 | 1986 | 75,800 | 1985 | 74,200 | 1984 | 72,550 | 1983 | 70,950 | 1982 | 69,600 | 1981 | 67,590 | 1980 | 64,780 | 1979 | 61,900 | 1978 | 60,050 | 1977 | 58,350 | 1976 | 55,550 | 1975 | 53,850 | 1974 | 51,680 | 1973 | 50,350 | 1972 | 49,750 | 1971 | 49,150 | 1970 | 48,550 | 1969 | 47,950 | 1968 | 47,350 | 1967 | 47,400 | 1966 | 47,300 | 1965 | 47,300 | 1964 | 47,200 | 1963 | 47,200 | 1962 | 47,100 | 1961 | 47,100 |
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