Year | Value | 2021 | 146,380 | 2020 | 146,350 | 2019 | 146,300 | 2018 | 146,220 | 2017 | 145,950 | 2016 | 145,650 | 2015 | 145,450 | 2014 | 145,330 | 2013 | 145,000 | 2012 | 144,000 | 2011 | 143,000 | 2010 | 143,000 | 2009 | 142,500 | 2008 | 142,400 | 2007 | 141,800 | 2006 | 141,300 | 2005 | 141,210 | 2004 | 141,230 | 2003 | 141,120 | 2002 | 140,910 | 2001 | 140,800 | 2000 | 140,790 | 1999 | 140,780 | 1998 | 140,670 | 1997 | 140,360 | 1996 | 140,350 | 1995 | 140,240 | 1994 | 140,480 | 1993 | 140,520 | 1992 | 140,550 | 1991 | 140,490 | 1990 | 141,410 | 1989 | 140,570 | 1988 | 140,810 | 1987 | 140,740 | 1986 | 140,980 | 1985 | 141,220 | 1984 | 141,360 | 1983 | 141,590 | 1982 | 141,730 | 1981 | 141,970 | 1980 | 142,210 | 1979 | 142,450 | 1978 | 142,480 | 1977 | 142,720 | 1976 | 142,960 | 1975 | 143,200 | 1974 | 143,340 | 1973 | 143,570 | 1972 | 143,810 | 1971 | 144,050 | 1970 | 144,290 | 1969 | 144,520 | 1968 | 144,760 | 1967 | 145,000 | 1966 | 145,240 | 1965 | 145,480 | 1964 | 145,710 | 1963 | 145,950 | 1962 | 146,190 | 1961 | 146,200 |
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