| Year | Value | | 2022 | 5,979,963 | | 2021 | 6,034,758 | | 2020 | 6,125,096 | | 2019 | 6,240,779 | | 2018 | 6,318,731 | | 2017 | 6,338,198 | | 2016 | 6,295,949 | | 2015 | 6,167,477 | | 2014 | 5,960,286 | | 2013 | 5,727,889 | | 2012 | 5,511,898 | | 2011 | 5,324,580 | | 2010 | 5,159,998 | | 2009 | 5,027,543 | | 2008 | 4,925,242 | | 2007 | 4,833,087 | | 2006 | 4,751,408 | | 2005 | 4,678,809 | | 2004 | 4,610,441 | | 2003 | 4,547,221 | | 2002 | 4,484,305 | | 2001 | 4,422,501 | | 2000 | 4,368,682 | | 1999 | 4,326,378 | | 1998 | 4,293,009 | | 1997 | 4,275,915 | | 1996 | 4,268,705 | | 1995 | 4,265,538 | | 1994 | 4,273,824 | | 1993 | 4,290,099 | | 1992 | 4,302,736 | | 1991 | 4,309,894 | | 1990 | 4,305,240 | | 1989 | 4,271,302 | | 1988 | 4,208,547 | | 1987 | 4,123,472 | | 1986 | 4,024,405 | | 1985 | 3,922,452 | | 1984 | 3,824,848 | | 1983 | 3,725,859 | | 1982 | 3,623,154 | | 1981 | 3,522,732 | | 1980 | 3,419,907 | | 1979 | 3,310,736 | | 1978 | 3,203,017 | | 1977 | 3,107,691 | | 1976 | 3,024,625 | | 1975 | 2,949,708 | | 1974 | 2,885,048 | | 1973 | 2,831,595 | | 1972 | 2,783,160 | | 1971 | 2,737,149 | | 1970 | 2,692,733 | | 1969 | 2,648,427 | | 1968 | 2,604,203 | | 1967 | 2,557,551 | | 1966 | 2,507,945 | | 1965 | 2,457,789 | | 1964 | 2,406,538 | | 1963 | 2,354,224 | | 1962 | 2,305,027 | | 1961 | 2,260,325 | | 1960 | 2,219,196 |
|