Year | Value | 2022 | 26,588,074 | 2021 | 27,224,853 | 2020 | 27,812,151 | 2019 | 28,345,533 | 2018 | 28,716,576 | 2017 | 28,938,392 | 2016 | 28,992,417 | 2015 | 28,869,765 | 2014 | 28,719,996 | 2013 | 28,603,105 | 2012 | 28,402,328 | 2011 | 28,076,117 | 2010 | 27,712,432 | 2009 | 27,247,044 | 2008 | 26,708,701 | 2007 | 26,216,507 | 2006 | 25,896,678 | 2005 | 25,712,254 | 2004 | 25,588,526 | 2003 | 25,513,601 | 2002 | 25,602,990 | 2001 | 25,879,199 | 2000 | 26,235,318 | 1999 | 26,647,348 | 1998 | 27,142,792 | 1997 | 27,719,319 | 1996 | 28,385,168 | 1995 | 29,142,609 | 1994 | 29,968,681 | 1993 | 30,782,649 | 1992 | 31,536,261 | 1991 | 32,204,802 | 1990 | 32,657,722 | 1989 | 32,916,383 | 1988 | 33,059,600 | 1987 | 33,056,117 | 1986 | 32,945,535 | 1985 | 32,852,504 | 1984 | 32,777,182 | 1983 | 32,630,156 | 1982 | 32,467,613 | 1981 | 32,382,076 | 1980 | 32,330,261 | 1979 | 32,311,689 | 1978 | 32,378,554 | 1977 | 32,497,039 | 1976 | 32,612,954 | 1975 | 32,677,236 | 1974 | 32,686,822 | 1973 | 32,763,273 | 1972 | 32,856,830 | 1971 | 32,896,720 | 1970 | 33,055,715 | 1969 | 33,403,184 | 1968 | 33,781,238 | 1967 | 34,101,677 | 1966 | 34,414,560 | 1965 | 34,751,095 | 1964 | 34,986,327 | 1963 | 34,996,782 | 1962 | 34,883,886 | 1961 | 34,668,804 | 1960 | 34,393,094 |
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