Year | Value | 2022 | 152,709 | 2021 | 150,909 | 2020 | 149,475 | 2019 | 147,987 | 2018 | 146,100 | 2017 | 144,335 | 2016 | 143,249 | 2015 | 143,812 | 2014 | 146,210 | 2013 | 149,763 | 2012 | 153,538 | 2011 | 156,631 | 2010 | 158,432 | 2009 | 159,175 | 2008 | 159,300 | 2007 | 158,742 | 2006 | 158,490 | 2005 | 159,077 | 2004 | 160,081 | 2003 | 160,941 | 2002 | 162,206 | 2001 | 163,614 | 2000 | 164,927 | 1999 | 166,594 | 1998 | 167,986 | 1997 | 168,520 | 1996 | 167,755 | 1995 | 165,127 | 1994 | 161,283 | 1993 | 156,980 | 1992 | 151,853 | 1991 | 146,639 | 1990 | 141,916 | 1989 | 137,303 | 1988 | 133,306 | 1987 | 130,661 | 1986 | 129,258 | 1985 | 129,436 | 1984 | 131,894 | 1983 | 136,262 | 1982 | 141,204 | 1981 | 146,515 | 1980 | 153,035 | 1979 | 159,317 | 1978 | 164,404 | 1977 | 169,795 | 1976 | 174,987 | 1975 | 177,184 | 1974 | 177,215 | 1973 | 177,537 | 1972 | 179,153 | 1971 | 183,563 | 1970 | 189,669 | 1969 | 195,269 | 1968 | 199,933 | 1967 | 201,102 | 1966 | 197,436 | 1965 | 192,219 | 1964 | 187,454 | 1963 | 182,989 | 1962 | 179,928 | 1961 | 178,634 | 1960 | 178,308 |
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