Year | Value | 2022 | 27,708 | 2021 | 27,650 | 2020 | 27,573 | 2019 | 27,502 | 2018 | 27,449 | 2017 | 27,420 | 2016 | 27,411 | 2015 | 27,433 | 2014 | 27,486 | 2013 | 27,566 | 2012 | 27,670 | 2011 | 27,801 | 2010 | 27,955 | 2009 | 28,120 | 2008 | 28,238 | 2007 | 28,296 | 2006 | 28,321 | 2005 | 28,297 | 2004 | 28,222 | 2003 | 28,177 | 2002 | 28,099 | 2001 | 27,921 | 2000 | 27,778 | 1999 | 27,737 | 1998 | 27,845 | 1997 | 28,145 | 1996 | 28,585 | 1995 | 29,058 | 1994 | 29,298 | 1993 | 29,423 | 1992 | 29,551 | 1991 | 29,549 | 1990 | 29,482 | 1989 | 29,256 | 1988 | 28,822 | 1987 | 28,363 | 1986 | 27,894 | 1985 | 27,323 | 1984 | 26,534 | 1983 | 25,739 | 1982 | 25,272 | 1981 | 25,087 | 1980 | 25,210 | 1979 | 25,841 | 1978 | 26,750 | 1977 | 27,602 | 1976 | 28,457 | 1975 | 29,419 | 1974 | 30,574 | 1973 | 31,898 | 1972 | 33,354 | 1971 | 34,215 | 1970 | 34,192 | 1969 | 33,801 | 1968 | 33,199 | 1967 | 32,606 | 1966 | 32,070 | 1965 | 31,464 | 1964 | 30,718 | 1963 | 29,578 | 1962 | 28,032 | 1961 | 26,767 | 1960 | 25,890 |
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