Year | Value | 2022 | 33,207,236 | 2021 | 33,168,704 | 2020 | 32,991,231 | 2019 | 32,844,549 | 2018 | 32,618,310 | 2017 | 32,376,640 | 2016 | 32,204,496 | 2015 | 32,022,639 | 2014 | 31,864,134 | 2013 | 31,756,486 | 2012 | 31,700,300 | 2011 | 31,717,057 | 2010 | 31,743,726 | 2009 | 31,697,921 | 2008 | 31,720,727 | 2007 | 31,743,530 | 2006 | 31,710,538 | 2005 | 31,731,249 | 2004 | 31,881,464 | 2003 | 32,080,613 | 2002 | 32,272,307 | 2001 | 32,530,715 | 2000 | 32,814,503 | 1999 | 32,971,141 | 1998 | 32,928,448 | 1997 | 32,794,772 | 1996 | 32,565,095 | 1995 | 32,217,661 | 1994 | 31,888,419 | 1993 | 31,562,735 | 1992 | 31,164,981 | 1991 | 30,728,599 | 1990 | 30,305,806 | 1989 | 29,972,060 | 1988 | 29,590,838 | 1987 | 29,118,916 | 1986 | 28,529,676 | 1985 | 27,341,411 | 1984 | 25,661,570 | 1983 | 24,082,383 | 1982 | 22,779,824 | 1981 | 22,116,244 | 1980 | 22,522,240 | 1979 | 23,663,587 | 1978 | 24,999,809 | 1977 | 26,294,594 | 1976 | 27,043,361 | 1975 | 27,083,088 | 1974 | 26,584,411 | 1973 | 25,718,652 | 1972 | 24,930,080 | 1971 | 24,431,659 | 1970 | 24,427,697 | 1969 | 24,878,919 | 1968 | 25,591,205 | 1967 | 26,199,049 | 1966 | 26,568,587 | 1965 | 26,706,531 | 1964 | 26,566,776 | 1963 | 26,237,837 | 1962 | 25,763,638 | 1961 | 25,167,368 | 1960 | 24,473,605 |
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