Year | Value | 2022 | 158,528 | 2021 | 158,358 | 2020 | 158,570 | 2019 | 157,149 | 2018 | 157,728 | 2017 | 158,007 | 2016 | 157,720 | 2015 | 157,502 | 2014 | 158,392 | 2013 | 159,896 | 2012 | 161,764 | 2011 | 162,488 | 2010 | 161,070 | 2009 | 157,826 | 2008 | 154,155 | 2007 | 150,338 | 2006 | 147,178 | 2005 | 145,645 | 2004 | 145,349 | 2003 | 144,712 | 2002 | 143,986 | 2001 | 144,038 | 2000 | 145,662 | 1999 | 147,232 | 1998 | 149,082 | 1997 | 150,749 | 1996 | 152,135 | 1995 | 152,766 | 1994 | 152,525 | 1993 | 151,565 | 1992 | 149,847 | 1991 | 147,471 | 1990 | 138,677 | 1989 | 134,996 | 1988 | 132,437 | 1987 | 130,342 | 1986 | 128,138 | 1985 | 128,224 | 1984 | 127,926 | 1983 | 127,257 | 1982 | 126,420 | 1981 | 126,991 | 1980 | 129,146 | 1979 | 132,452 | 1978 | 137,703 | 1977 | 143,410 | 1976 | 148,924 | 1975 | 153,185 | 1974 | 154,812 | 1973 | 154,668 | 1972 | 153,461 | 1971 | 152,187 | 1970 | 151,340 | 1969 | 150,807 | 1968 | 151,780 | 1967 | 154,105 | 1966 | 155,901 | 1965 | 157,427 | 1964 | 157,856 | 1963 | 156,019 | 1962 | 153,524 | 1961 | 150,105 | 1960 | 147,000 |
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