Year | Value | 2022 | 38,892 | 2021 | 39,293 | 2020 | 35,232 | 2019 | 29,801 | 2018 | 25,401 | 2017 | 24,449 | 2016 | 26,460 | 2015 | 29,298 | 2014 | 32,124 | 2013 | 33,800 | 2012 | 34,324 | 2011 | 34,242 | 2010 | 34,259 | 2009 | 34,533 | 2008 | 34,555 | 2007 | 34,213 | 2006 | 33,829 | 2005 | 33,706 | 2004 | 34,003 | 2003 | 34,790 | 2002 | 35,670 | 2001 | 36,090 | 2000 | 35,883 | 1999 | 34,747 | 1998 | 33,067 | 1997 | 31,696 | 1996 | 31,156 | 1995 | 31,124 | 1994 | 31,137 | 1993 | 30,368 | 1992 | 28,649 | 1991 | 26,513 | 1990 | 24,615 | 1989 | 23,528 | 1988 | 23,598 | 1987 | 24,655 | 1986 | 26,055 | 1985 | 27,246 | 1984 | 27,778 | 1983 | 27,462 | 1982 | 26,479 | 1981 | 25,268 | 1980 | 24,227 | 1979 | 23,440 | 1978 | 22,886 | 1977 | 22,526 | 1976 | 22,214 | 1975 | 21,785 | 1974 | 21,172 | 1973 | 20,330 | 1972 | 19,271 | 1971 | 18,101 | 1970 | 16,954 | 1969 | 15,898 | 1968 | 14,963 | 1967 | 14,148 | 1966 | 13,436 | 1965 | 12,811 | 1964 | 12,291 | 1963 | 11,907 | 1962 | 11,685 | 1961 | 11,578 | 1960 | 11,512 |
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