Year | Value | 2022 | 13,465,474 | 2021 | 13,441,772 | 2020 | 13,276,111 | 2019 | 13,205,975 | 2018 | 13,201,653 | 2017 | 13,299,823 | 2016 | 13,553,865 | 2015 | 13,886,334 | 2014 | 14,158,937 | 2013 | 14,283,341 | 2012 | 14,309,883 | 2011 | 14,230,730 | 2010 | 14,007,746 | 2009 | 13,783,547 | 2008 | 13,595,164 | 2007 | 13,358,395 | 2006 | 13,112,034 | 2005 | 12,899,781 | 2004 | 12,703,039 | 2003 | 12,424,069 | 2002 | 12,061,064 | 2001 | 11,635,578 | 2000 | 10,895,568 | 1999 | 9,845,795 | 1998 | 8,831,269 | 1997 | 8,098,658 | 1996 | 7,847,475 | 1995 | 8,236,322 | 1994 | 9,126,341 | 1993 | 10,226,826 | 1992 | 11,278,650 | 1991 | 11,864,796 | 1990 | 11,939,426 | 1989 | 11,652,194 | 1988 | 11,083,593 | 1987 | 10,540,563 | 1986 | 10,220,510 | 1985 | 10,208,834 | 1984 | 10,504,570 | 1983 | 10,980,979 | 1982 | 11,344,359 | 1981 | 11,439,183 | 1980 | 11,215,175 | 1979 | 10,691,184 | 1978 | 9,957,720 | 1977 | 9,091,258 | 1976 | 8,238,893 | 1975 | 7,477,475 | 1974 | 6,832,547 | 1973 | 6,313,515 | 1972 | 5,856,470 | 1971 | 5,473,780 | 1970 | 5,301,957 | 1969 | 5,388,557 | 1968 | 5,611,506 | 1967 | 5,968,958 | 1966 | 6,395,852 | 1965 | 6,715,325 | 1964 | 6,829,924 | 1963 | 6,784,551 | 1962 | 6,689,572 | 1961 | 6,591,343 | 1960 | 6,446,590 |
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