| Year | Value | | 2022 | 6,961,696 | | 2021 | 6,738,389 | | 2020 | 6,523,584 | | 2019 | 6,321,141 | | 2018 | 6,136,336 | | 2017 | 5,971,197 | | 2016 | 5,852,597 | | 2015 | 5,777,219 | | 2014 | 5,697,804 | | 2013 | 5,602,447 | | 2012 | 5,502,998 | | 2011 | 5,387,459 | | 2010 | 5,252,869 | | 2009 | 5,115,444 | | 2008 | 4,993,445 | | 2007 | 4,892,084 | | 2006 | 4,807,501 | | 2005 | 4,736,797 | | 2004 | 4,671,971 | | 2003 | 4,607,498 | | 2002 | 4,547,207 | | 2001 | 4,463,851 | | 2000 | 4,337,960 | | 1999 | 4,212,147 | | 1998 | 4,097,986 | | 1997 | 3,975,777 | | 1996 | 3,844,553 | | 1995 | 3,702,909 | | 1994 | 3,565,747 | | 1993 | 3,430,029 | | 1992 | 3,312,901 | | 1991 | 3,191,245 | | 1990 | 3,036,803 | | 1989 | 2,891,009 | | 1988 | 2,767,073 | | 1987 | 2,670,771 | | 1986 | 2,605,027 | | 1985 | 2,563,389 | | 1984 | 2,546,101 | | 1983 | 2,532,235 | | 1982 | 2,484,070 | | 1981 | 2,400,420 | | 1980 | 2,301,268 | | 1979 | 2,212,107 | | 1978 | 2,139,234 | | 1977 | 2,073,226 | | 1976 | 2,013,019 | | 1975 | 1,958,807 | | 1974 | 1,910,687 | | 1973 | 1,868,690 | | 1972 | 1,831,299 | | 1971 | 1,799,279 | | 1970 | 1,766,957 | | 1969 | 1,731,310 | | 1968 | 1,696,924 | | 1967 | 1,663,722 | | 1966 | 1,632,147 | | 1965 | 1,602,484 | | 1964 | 1,574,352 | | 1963 | 1,547,259 | | 1962 | 1,520,936 | | 1961 | 1,495,069 | | 1960 | 1,466,556 |
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