Year | Value | 2022 | 49,874 | 2021 | 41,716 | 2020 | 41,801 | 2019 | 41,863 | 2018 | 41,907 | 2017 | 41,921 | 2016 | 41,818 | 2015 | 41,665 | 2014 | 41,140 | 2013 | 40,894 | 2012 | 40,513 | 2011 | 40,468 | 2010 | 41,890 | 2009 | 41,057 | 2008 | 41,201 | 2007 | 40,573 | 2006 | 40,634 | 2005 | 40,045 | 2004 | 40,093 | 2003 | 40,461 | 2002 | 41,128 | 2001 | 40,076 | 2000 | 40,214 | 1999 | 40,014 | 1998 | 39,375 | 1997 | 38,736 | 1996 | 38,393 | 1995 | 37,928 | 1994 | 37,455 | 1993 | 36,535 | 1992 | 35,833 | 1991 | 35,708 | 1990 | 35,261 | 1989 | 35,102 | 1988 | 34,895 | 1987 | 34,755 | 1986 | 33,301 | 1985 | 33,084 | 1984 | 32,807 | 1983 | 32,604 | 1982 | 32,634 | 1981 | 32,432 | 1980 | 32,032 | 1979 | 31,731 | 1978 | 31,450 | 1977 | 31,337 | 1976 | 31,599 | 1975 | 31,860 | 1974 | 32,000 | 1973 | 32,271 | 1972 | 32,608 | 1971 | 32,633 | 1970 | 32,660 | 1969 | 32,547 | 1968 | 32,398 | 1967 | 32,218 | 1966 | 32,006 | 1965 | 31,767 | 1964 | 31,503 | 1963 | 31,227 | 1962 | 30,924 | 1961 | 30,573 | 1960 | 30,160 |
|