Year | Value | 2022 | 11,722 | 2021 | 11,753 | 2020 | 11,898 | 2019 | 12,171 | 2018 | 12,355 | 2017 | 12,552 | 2016 | 12,853 | 2015 | 13,102 | 2014 | 13,559 | 2013 | 14,304 | 2012 | 14,965 | 2011 | 15,484 | 2010 | 15,981 | 2009 | 16,093 | 2008 | 15,909 | 2007 | 15,769 | 2006 | 15,637 | 2005 | 15,498 | 2004 | 15,363 | 2003 | 15,344 | 2002 | 15,486 | 2001 | 15,678 | 2000 | 16,012 | 1999 | 16,449 | 1998 | 16,851 | 1997 | 17,246 | 1996 | 17,508 | 1995 | 17,486 | 1994 | 17,352 | 1993 | 17,038 | 1992 | 16,359 | 1991 | 15,727 | 1990 | 15,380 | 1989 | 15,092 | 1988 | 14,794 | 1987 | 14,588 | 1986 | 14,390 | 1985 | 14,103 | 1984 | 13,775 | 1983 | 13,462 | 1982 | 13,192 | 1981 | 12,959 | 1980 | 12,749 | 1979 | 12,631 | 1978 | 12,633 | 1977 | 12,702 | 1976 | 12,803 | 1975 | 12,934 | 1974 | 13,080 | 1973 | 13,303 | 1972 | 13,577 | 1971 | 13,834 | 1970 | 14,138 | 1969 | 14,222 | 1968 | 13,853 | 1967 | 13,265 | 1966 | 12,644 | 1965 | 12,014 | 1964 | 11,434 | 1963 | 10,945 | 1962 | 10,484 | 1961 | 10,009 | 1960 | 9,552 |
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