Year | Value | 2022 | 57,916 | 2021 | 56,423 | 2020 | 53,653 | 2019 | 50,639 | 2018 | 47,875 | 2017 | 45,032 | 2016 | 42,707 | 2015 | 40,764 | 2014 | 38,492 | 2013 | 36,421 | 2012 | 35,294 | 2011 | 34,594 | 2010 | 34,253 | 2009 | 34,842 | 2008 | 35,650 | 2007 | 35,784 | 2006 | 35,413 | 2005 | 34,571 | 2004 | 33,312 | 2003 | 31,693 | 2002 | 29,907 | 2001 | 28,281 | 2000 | 27,069 | 1999 | 26,394 | 1998 | 26,388 | 1997 | 26,895 | 1996 | 27,408 | 1995 | 27,569 | 1994 | 27,355 | 1993 | 26,728 | 1992 | 25,767 | 1991 | 24,828 | 1990 | 24,180 | 1989 | 23,807 | 1988 | 23,635 | 1987 | 23,674 | 1986 | 23,782 | 1985 | 23,851 | 1984 | 23,913 | 1983 | 24,006 | 1982 | 24,121 | 1981 | 24,346 | 1980 | 24,776 | 1979 | 25,438 | 1978 | 26,344 | 1977 | 27,343 | 1976 | 28,072 | 1975 | 28,288 | 1974 | 27,944 | 1973 | 26,987 | 1972 | 25,647 | 1971 | 24,498 | 1970 | 23,905 | 1969 | 23,852 | 1968 | 24,333 | 1967 | 25,123 | 1966 | 25,648 | 1965 | 25,555 | 1964 | 24,878 | 1963 | 23,660 | 1962 | 22,041 | 1961 | 20,431 | 1960 | 19,133 |
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