| Year | Value | | 2022 | 6,324,885 | | 2021 | 6,156,493 | | 2020 | 6,017,723 | | 2019 | 5,920,408 | | 2018 | 5,777,845 | | 2017 | 5,649,564 | | 2016 | 5,576,112 | | 2015 | 5,507,997 | | 2014 | 5,443,874 | | 2013 | 5,389,138 | | 2012 | 5,336,345 | | 2011 | 5,279,895 | | 2010 | 5,200,955 | | 2009 | 5,098,487 | | 2008 | 4,983,966 | | 2007 | 4,871,799 | | 2006 | 4,792,215 | | 2005 | 4,778,164 | | 2004 | 4,846,730 | | 2003 | 5,029,228 | | 2002 | 5,294,282 | | 2001 | 5,590,161 | | 2000 | 5,906,902 | | 1999 | 6,199,567 | | 1998 | 6,392,225 | | 1997 | 6,485,096 | | 1996 | 6,491,408 | | 1995 | 6,430,201 | | 1994 | 6,370,296 | | 1993 | 6,295,516 | | 1992 | 6,205,273 | | 1991 | 6,135,253 | | 1990 | 6,028,979 | | 1989 | 5,927,123 | | 1988 | 5,793,063 | | 1987 | 5,608,185 | | 1986 | 5,384,356 | | 1985 | 4,977,175 | | 1984 | 4,318,335 | | 1983 | 3,646,823 | | 1982 | 3,156,845 | | 1981 | 3,006,232 | | 1980 | 3,299,461 | | 1979 | 3,954,178 | | 1978 | 4,793,859 | | 1977 | 5,570,984 | | 1976 | 5,952,226 | | 1975 | 5,939,737 | | 1974 | 5,667,415 | | 1973 | 5,213,696 | | 1972 | 4,842,895 | | 1971 | 4,636,262 | | 1970 | 4,672,213 | | 1969 | 4,967,782 | | 1968 | 5,408,994 | | 1967 | 5,744,839 | | 1966 | 5,953,822 | | 1965 | 6,047,245 | | 1964 | 5,958,203 | | 1963 | 5,738,085 | | 1962 | 5,413,900 | | 1961 | 5,000,664 | | 1960 | 4,549,339 |
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