| Year | Value | | 2022 | 4,513,603 | | 2021 | 4,422,490 | | 2020 | 4,668,789 | | 2019 | 5,222,560 | | 2018 | 5,913,032 | | 2017 | 6,563,727 | | 2016 | 6,875,518 | | 2015 | 6,836,482 | | 2014 | 6,547,253 | | 2013 | 6,064,952 | | 2012 | 5,584,542 | | 2011 | 5,264,921 | | 2010 | 5,189,270 | | 2009 | 5,335,651 | | 2008 | 5,629,859 | | 2007 | 5,875,962 | | 2006 | 6,013,750 | | 2005 | 6,037,857 | | 2004 | 5,951,507 | | 2003 | 5,781,700 | | 2002 | 5,521,005 | | 2001 | 5,204,031 | | 2000 | 4,832,351 | | 1999 | 4,458,294 | | 1998 | 4,143,693 | | 1997 | 3,871,613 | | 1996 | 3,665,006 | | 1995 | 3,624,698 | | 1994 | 3,756,138 | | 1993 | 3,945,600 | | 1992 | 4,230,673 | | 1991 | 4,573,444 | | 1990 | 4,794,459 | | 1989 | 4,823,001 | | 1988 | 4,737,061 | | 1987 | 4,610,264 | | 1986 | 4,458,321 | | 1985 | 4,339,340 | | 1984 | 4,226,106 | | 1983 | 4,135,916 | | 1982 | 4,053,898 | | 1981 | 3,961,217 | | 1980 | 3,853,405 | | 1979 | 3,719,205 | | 1978 | 3,519,216 | | 1977 | 3,294,739 | | 1976 | 3,096,574 | | 1975 | 2,921,179 | | 1974 | 2,776,691 | | 1973 | 2,668,847 | | 1972 | 2,578,567 | | 1971 | 2,458,691 | | 1970 | 2,359,224 | | 1969 | 2,303,160 | | 1968 | 2,283,528 | | 1967 | 2,269,179 | | 1966 | 2,240,604 | | 1965 | 2,211,670 | | 1964 | 2,172,637 | | 1963 | 2,070,551 | | 1962 | 1,971,913 | | 1961 | 1,909,566 | | 1960 | 1,824,745 |
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