Year | Value | 2022 | 33,338,494 | 2021 | 32,936,395 | 2020 | 32,293,484 | 2019 | 31,660,035 | 2018 | 31,065,733 | 2017 | 30,460,019 | 2016 | 29,792,031 | 2015 | 29,112,305 | 2014 | 28,435,231 | 2013 | 27,724,776 | 2012 | 26,992,074 | 2011 | 26,265,675 | 2010 | 25,533,837 | 2009 | 24,785,624 | 2008 | 24,057,953 | 2007 | 23,391,980 | 2006 | 22,755,431 | 2005 | 22,112,640 | 2004 | 21,500,961 | 2003 | 20,925,221 | 2002 | 20,353,718 | 2001 | 19,807,607 | 2000 | 19,321,914 | 1999 | 18,874,413 | 1998 | 18,464,397 | 1997 | 18,103,531 | 1996 | 17,775,576 | 1995 | 17,428,763 | 1994 | 16,977,827 | 1993 | 16,499,290 | 1992 | 16,043,773 | 1991 | 15,604,008 | 1990 | 15,221,611 | 1989 | 14,812,793 | 1988 | 14,477,623 | 1987 | 14,175,021 | 1986 | 13,872,526 | 1985 | 13,556,474 | 1984 | 13,215,958 | 1983 | 12,848,995 | 1982 | 12,480,039 | 1981 | 12,137,671 | 1980 | 11,770,580 | 1979 | 11,376,097 | 1978 | 11,029,838 | 1977 | 10,734,643 | 1976 | 10,516,762 | 1975 | 10,416,193 | 1974 | 10,403,235 | 1973 | 10,445,269 | 1972 | 10,520,997 | 1971 | 10,498,317 | 1970 | 10,337,753 | 1969 | 10,064,606 | 1968 | 9,696,164 | 1967 | 9,329,424 | 1966 | 9,038,518 | 1965 | 8,882,078 | 1964 | 8,838,922 | 1963 | 8,865,876 | 1962 | 8,875,525 | 1961 | 8,837,008 | 1960 | 8,746,838 |
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