Year | Value | 2022 | 44,777 | 2021 | 42,833 | 2020 | 41,623 | 2019 | 40,851 | 2018 | 40,425 | 2017 | 40,666 | 2016 | 41,539 | 2015 | 42,768 | 2014 | 43,726 | 2013 | 44,114 | 2012 | 44,199 | 2011 | 43,959 | 2010 | 43,703 | 2009 | 43,501 | 2008 | 43,152 | 2007 | 42,926 | 2006 | 42,927 | 2005 | 42,703 | 2004 | 42,586 | 2003 | 42,748 | 2002 | 42,688 | 2001 | 42,152 | 2000 | 40,741 | 1999 | 37,981 | 1998 | 35,316 | 1997 | 34,166 | 1996 | 34,853 | 1995 | 37,025 | 1994 | 39,954 | 1993 | 43,412 | 1992 | 46,480 | 1991 | 47,422 | 1990 | 47,063 | 1989 | 46,313 | 1988 | 44,834 | 1987 | 43,777 | 1986 | 43,510 | 1985 | 43,960 | 1984 | 44,955 | 1983 | 46,118 | 1982 | 46,777 | 1981 | 46,238 | 1980 | 44,273 | 1979 | 41,767 | 1978 | 39,287 | 1977 | 36,357 | 1976 | 33,702 | 1975 | 31,754 | 1974 | 29,885 | 1973 | 28,227 | 1972 | 26,395 | 1971 | 24,526 | 1970 | 23,808 | 1969 | 24,427 | 1968 | 25,363 | 1967 | 26,973 | 1966 | 29,153 | 1965 | 30,498 | 1964 | 30,923 | 1963 | 30,752 | 1962 | 30,375 | 1961 | 30,243 | 1960 | 30,077 |
|