| Year | Value | | 2022 | 16,395,044 | | 2021 | 15,815,458 | | 2020 | 15,248,270 | | 2019 | 14,687,684 | | 2018 | 14,136,765 | | 2017 | 13,605,785 | | 2016 | 13,083,840 | | 2015 | 12,559,842 | | 2014 | 12,036,424 | | 2013 | 11,546,101 | | 2012 | 11,098,737 | | 2011 | 10,666,950 | | 2010 | 10,248,917 | | 2009 | 9,843,943 | | 2008 | 9,454,260 | | 2007 | 9,079,573 | | 2006 | 8,723,538 | | 2005 | 8,385,541 | | 2004 | 8,058,430 | | 2003 | 7,741,811 | | 2002 | 7,437,901 | | 2001 | 7,148,432 | | 2000 | 6,873,014 | | 1999 | 6,606,306 | | 1998 | 6,348,238 | | 1997 | 6,099,964 | | 1996 | 5,859,653 | | 1995 | 5,624,594 | | 1994 | 5,394,595 | | 1993 | 5,169,399 | | 1992 | 4,950,532 | | 1991 | 4,738,765 | | 1990 | 4,533,001 | | 1989 | 4,333,890 | | 1988 | 4,143,619 | | 1987 | 3,958,728 | | 1986 | 3,754,243 | | 1985 | 3,552,277 | | 1984 | 3,361,279 | | 1983 | 3,185,814 | | 1982 | 3,040,963 | | 1981 | 2,892,484 | | 1980 | 2,719,634 | | 1979 | 2,562,948 | | 1978 | 2,425,940 | | 1977 | 2,297,646 | | 1976 | 2,178,962 | | 1975 | 2,018,903 | | 1974 | 1,854,793 | | 1973 | 1,702,361 | | 1972 | 1,561,207 | | 1971 | 1,430,447 | | 1970 | 1,309,916 | | 1969 | 1,230,656 | | 1968 | 1,156,508 | | 1967 | 1,086,868 | | 1966 | 1,021,634 | | 1965 | 960,487 | | 1964 | 903,162 | | 1963 | 849,243 | | 1962 | 798,652 | | 1961 | 753,427 | | 1960 | 713,241 |
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