Year | Value | 2022 | 48,176 | 2021 | 48,973 | 2020 | 49,305 | 2019 | 49,210 | 2018 | 48,410 | 2017 | 47,200 | 2016 | 45,985 | 2015 | 45,001 | 2014 | 44,417 | 2013 | 44,529 | 2012 | 45,313 | 2011 | 46,738 | 2010 | 48,625 | 2009 | 50,562 | 2008 | 52,261 | 2007 | 53,389 | 2006 | 53,728 | 2005 | 53,343 | 2004 | 52,367 | 2003 | 51,052 | 2002 | 49,593 | 2001 | 48,302 | 2000 | 47,274 | 1999 | 46,566 | 1998 | 46,218 | 1997 | 46,563 | 1996 | 47,402 | 1995 | 48,717 | 1994 | 50,215 | 1993 | 51,257 | 1992 | 51,959 | 1991 | 51,945 | 1990 | 51,552 | 1989 | 51,068 | 1988 | 50,324 | 1987 | 49,542 | 1986 | 48,784 | 1985 | 47,996 | 1984 | 47,057 | 1983 | 46,086 | 1982 | 45,440 | 1981 | 44,835 | 1980 | 44,136 | 1979 | 43,093 | 1978 | 41,465 | 1977 | 39,399 | 1976 | 36,809 | 1975 | 34,208 | 1974 | 31,856 | 1973 | 29,823 | 1972 | 28,138 | 1971 | 26,740 | 1970 | 25,512 | 1969 | 24,484 | 1968 | 23,734 | 1967 | 23,284 | 1966 | 23,082 | 1965 | 22,990 | 1964 | 22,831 | 1963 | 22,507 | 1962 | 22,075 | 1961 | 21,731 | 1960 | 22,154 |
|