Year | Value | 2022 | 22,184,603 | 2021 | 22,435,732 | 2020 | 22,725,113 | 2019 | 23,035,513 | 2018 | 23,252,623 | 2017 | 23,326,793 | 2016 | 23,270,966 | 2015 | 23,019,946 | 2014 | 22,547,099 | 2013 | 21,945,776 | 2012 | 21,316,695 | 2011 | 20,710,626 | 2010 | 20,125,409 | 2009 | 19,574,027 | 2008 | 19,058,390 | 2007 | 18,607,347 | 2006 | 18,261,671 | 2005 | 17,964,709 | 2004 | 17,695,047 | 2003 | 17,481,399 | 2002 | 17,335,618 | 2001 | 17,240,484 | 2000 | 17,209,650 | 1999 | 17,280,636 | 1998 | 17,461,400 | 1997 | 17,731,397 | 1996 | 18,035,327 | 1995 | 18,296,629 | 1994 | 18,471,284 | 1993 | 18,564,428 | 1992 | 18,591,963 | 1991 | 18,589,770 | 1990 | 18,580,016 | 1989 | 18,336,715 | 1988 | 18,213,112 | 1987 | 18,008,478 | 1986 | 17,696,951 | 1985 | 17,307,937 | 1984 | 16,877,792 | 1983 | 16,394,342 | 1982 | 15,885,613 | 1981 | 15,384,031 | 1980 | 14,897,377 | 1979 | 14,426,112 | 1978 | 14,009,318 | 1977 | 13,633,051 | 1976 | 13,205,725 | 1975 | 12,763,654 | 1974 | 12,413,055 | 1973 | 12,140,148 | 1972 | 11,883,826 | 1971 | 11,625,519 | 1970 | 11,364,679 | 1969 | 11,111,063 | 1968 | 10,867,718 | 1967 | 10,627,404 | 1966 | 10,374,351 | 1965 | 10,106,104 | 1964 | 9,831,736 | 1963 | 9,551,487 | 1962 | 9,272,578 | 1961 | 9,026,185 | 1960 | 8,814,182 |
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