Year | Value | 2022 | 51,364 | 2021 | 50,984 | 2020 | 50,932 | 2019 | 50,612 | 2018 | 50,025 | 2017 | 49,597 | 2016 | 49,101 | 2015 | 47,941 | 2014 | 46,623 | 2013 | 45,178 | 2012 | 43,236 | 2011 | 41,339 | 2010 | 39,436 | 2009 | 37,734 | 2008 | 36,308 | 2007 | 34,935 | 2006 | 33,612 | 2005 | 32,319 | 2004 | 31,037 | 2003 | 29,741 | 2002 | 28,439 | 2001 | 27,165 | 2000 | 25,922 | 1999 | 24,727 | 1998 | 24,248 | 1997 | 23,941 | 1996 | 23,172 | 1995 | 22,460 | 1994 | 21,600 | 1993 | 20,919 | 1992 | 20,582 | 1991 | 20,127 | 1990 | 19,561 | 1989 | 19,307 | 1988 | 20,374 | 1987 | 21,407 | 1986 | 21,145 | 1985 | 20,639 | 1984 | 20,124 | 1983 | 19,548 | 1982 | 18,873 | 1981 | 18,181 | 1980 | 17,538 | 1979 | 16,943 | 1978 | 16,388 | 1977 | 15,869 | 1976 | 15,386 | 1975 | 14,913 | 1974 | 14,442 | 1973 | 13,966 | 1972 | 13,576 | 1971 | 13,308 | 1970 | 13,232 | 1969 | 13,365 | 1968 | 13,557 | 1967 | 13,797 | 1966 | 14,091 | 1965 | 14,294 | 1964 | 14,274 | 1963 | 14,239 | 1962 | 14,203 | 1961 | 14,083 | 1960 | 13,977 |
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