Year | Value | 2022 | 27,765,038 | 2021 | 28,580,416 | 2020 | 29,383,948 | 2019 | 30,247,064 | 2018 | 31,085,841 | 2017 | 31,835,154 | 2016 | 32,389,825 | 2015 | 32,693,130 | 2014 | 32,807,605 | 2013 | 32,826,596 | 2012 | 32,738,854 | 2011 | 32,582,860 | 2010 | 32,496,869 | 2009 | 32,384,946 | 2008 | 32,184,051 | 2007 | 31,936,276 | 2006 | 31,765,943 | 2005 | 31,584,451 | 2004 | 31,409,599 | 2003 | 31,266,073 | 2002 | 31,191,026 | 2001 | 31,225,047 | 2000 | 31,267,878 | 1999 | 31,296,742 | 1998 | 31,404,558 | 1997 | 31,505,013 | 1996 | 31,508,734 | 1995 | 31,587,048 | 1994 | 31,835,329 | 1993 | 32,129,666 | 1992 | 32,391,394 | 1991 | 32,676,058 | 1990 | 32,934,078 | 1989 | 33,088,664 | 1988 | 33,032,454 | 1987 | 32,862,032 | 1986 | 32,608,363 | 1985 | 32,262,107 | 1984 | 31,947,322 | 1983 | 31,639,130 | 1982 | 31,256,854 | 1981 | 30,844,758 | 1980 | 30,460,070 | 1979 | 30,123,104 | 1978 | 29,757,600 | 1977 | 29,347,824 | 1976 | 28,811,590 | 1975 | 27,633,835 | 1974 | 25,965,792 | 1973 | 24,365,798 | 1972 | 23,004,696 | 1971 | 22,303,239 | 1970 | 22,735,768 | 1969 | 23,929,699 | 1968 | 25,291,830 | 1967 | 26,593,080 | 1966 | 27,349,934 | 1965 | 27,399,991 | 1964 | 26,914,912 | 1963 | 26,080,559 | 1962 | 25,333,685 | 1961 | 24,900,259 | 1960 | 24,948,677 |
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