| Year | Value | | 2021 | 162,000 | | 2020 | 162,000 | | 2019 | 162,000 | | 2018 | 162,000 | | 2017 | 162,000 | | 2016 | 162,000 | | 2015 | 162,000 | | 2014 | 162,000 | | 2013 | 162,000 | | 2012 | 162,000 | | 2011 | 164,000 | | 2010 | 162,000 | | 2009 | 163,000 | | 2008 | 164,500 | | 2007 | 162,000 | | 2006 | 163,000 | | 2005 | 161,000 | | 2004 | 160,000 | | 2003 | 156,500 | | 2002 | 154,700 | | 2001 | 152,400 | | 2000 | 150,600 | | 1999 | 148,400 | | 1998 | 145,200 | | 1997 | 144,190 | | 1996 | 142,350 | | 1995 | 138,600 | | 1994 | 137,200 | | 1993 | 135,200 | | 1992 | 133,500 | | 1991 | 131,800 | | 1990 | 130,100 | | 1989 | 129,550 | | 1988 | 128,800 | | 1987 | 127,900 | | 1986 | 127,150 | | 1985 | 126,400 | | 1984 | 125,650 | | 1983 | 125,100 | | 1982 | 124,350 | | 1981 | 123,500 | | 1980 | 122,750 | | 1979 | 122,150 | | 1978 | 121,650 | | 1977 | 121,150 | | 1976 | 120,900 | | 1975 | 120,550 | | 1974 | 120,200 | | 1973 | 119,350 | | 1972 | 119,000 | | 1971 | 118,350 | | 1970 | 117,500 | | 1969 | 116,650 | | 1968 | 115,800 | | 1967 | 114,950 | | 1966 | 114,100 | | 1965 | 113,050 | | 1964 | 112,400 | | 1963 | 111,550 | | 1962 | 110,700 | | 1961 | 109,850 |
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