Year | Value | 2022 | 48,981 | 2021 | 48,709 | 2020 | 48,428 | 2019 | 48,156 | 2018 | 47,910 | 2017 | 47,658 | 2016 | 47,388 | 2015 | 47,087 | 2014 | 46,748 | 2013 | 46,401 | 2012 | 46,022 | 2011 | 45,588 | 2010 | 45,097 | 2009 | 44,522 | 2008 | 43,883 | 2007 | 43,270 | 2006 | 42,715 | 2005 | 42,209 | 2004 | 41,753 | 2003 | 41,329 | 2002 | 40,894 | 2001 | 40,383 | 2000 | 39,748 | 1999 | 39,039 | 1998 | 38,293 | 1997 | 37,483 | 1996 | 36,627 | 1995 | 35,779 | 1994 | 34,974 | 1993 | 34,212 | 1992 | 33,487 | 1991 | 32,916 | 1990 | 32,834 | 1989 | 33,120 | 1988 | 33,434 | 1987 | 33,755 | 1986 | 34,071 | 1985 | 34,380 | 1984 | 34,682 | 1983 | 34,772 | 1982 | 34,664 | 1981 | 34,568 | 1980 | 34,456 | 1979 | 34,294 | 1978 | 34,135 | 1977 | 34,011 | 1976 | 33,923 | 1975 | 33,917 | 1974 | 33,974 | 1973 | 34,061 | 1972 | 34,142 | 1971 | 34,148 | 1970 | 34,003 | 1969 | 33,569 | 1968 | 32,949 | 1967 | 32,353 | 1966 | 31,777 | 1965 | 31,220 | 1964 | 30,666 | 1963 | 30,191 | 1962 | 29,798 | 1961 | 29,413 | 1960 | 28,965 |
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