Year | Value | 2022 | 30,379 | 2021 | 30,367 | 2020 | 30,192 | 2019 | 29,859 | 2018 | 29,521 | 2017 | 29,177 | 2016 | 28,820 | 2015 | 28,490 | 2014 | 28,352 | 2013 | 28,391 | 2012 | 28,442 | 2011 | 28,505 | 2010 | 28,598 | 2009 | 28,703 | 2008 | 28,787 | 2007 | 28,852 | 2006 | 28,917 | 2005 | 29,080 | 2004 | 29,155 | 2003 | 29,045 | 2002 | 29,014 | 2001 | 29,053 | 2000 | 29,069 | 1999 | 28,993 | 1998 | 28,869 | 1997 | 28,764 | 1996 | 28,768 | 1995 | 28,880 | 1994 | 29,422 | 1993 | 30,397 | 1992 | 31,342 | 1991 | 32,227 | 1990 | 32,953 | 1989 | 33,038 | 1988 | 32,629 | 1987 | 32,256 | 1986 | 31,894 | 1985 | 31,553 | 1984 | 31,211 | 1983 | 30,852 | 1982 | 30,466 | 1981 | 30,049 | 1980 | 29,627 | 1979 | 29,214 | 1978 | 28,807 | 1977 | 28,495 | 1976 | 28,403 | 1975 | 28,306 | 1974 | 28,196 | 1973 | 28,076 | 1972 | 27,950 | 1971 | 27,818 | 1970 | 27,678 | 1969 | 27,549 | 1968 | 27,424 | 1967 | 27,284 | 1966 | 27,130 | 1965 | 27,059 | 1964 | 26,999 | 1963 | 26,962 | 1962 | 26,935 | 1961 | 26,917 | 1960 | 26,851 |
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