| Year | Value | | 2022 | 5,873,012 | | 2021 | 6,133,970 | | 2020 | 6,268,408 | | 2019 | 6,321,013 | | 2018 | 6,333,645 | | 2017 | 6,270,349 | | 2016 | 6,114,955 | | 2015 | 5,991,833 | | 2014 | 5,889,920 | | 2013 | 5,735,307 | | 2012 | 5,580,903 | | 2011 | 5,481,787 | | 2010 | 5,389,564 | | 2009 | 5,304,747 | | 2008 | 5,240,122 | | 2007 | 5,192,961 | | 2006 | 5,159,295 | | 2005 | 5,122,282 | | 2004 | 5,066,019 | | 2003 | 4,993,973 | | 2002 | 4,898,217 | | 2001 | 4,808,177 | | 2000 | 4,777,089 | | 1999 | 4,818,093 | | 1998 | 4,982,849 | | 1997 | 5,246,410 | | 1996 | 5,561,409 | | 1995 | 5,896,800 | | 1994 | 6,188,413 | | 1993 | 6,389,831 | | 1992 | 6,518,691 | | 1991 | 6,556,219 | | 1990 | 6,520,321 | | 1989 | 6,501,618 | | 1988 | 6,426,437 | | 1987 | 6,319,032 | | 1986 | 6,229,260 | | 1985 | 6,112,955 | | 1984 | 5,975,664 | | 1983 | 5,827,828 | | 1982 | 5,657,399 | | 1981 | 5,452,304 | | 1980 | 5,052,449 | | 1979 | 4,413,489 | | 1978 | 3,746,829 | | 1977 | 3,207,204 | | 1976 | 2,995,959 | | 1975 | 3,255,351 | | 1974 | 3,882,689 | | 1973 | 4,691,535 | | 1972 | 5,461,023 | | 1971 | 5,848,970 | | 1970 | 5,856,037 | | 1969 | 5,613,272 | | 1968 | 5,185,837 | | 1967 | 4,826,056 | | 1966 | 4,650,263 | | 1965 | 4,717,654 | | 1964 | 4,965,415 | | 1963 | 5,333,681 | | 1962 | 5,608,439 | | 1961 | 5,705,244 | | 1960 | 5,572,051 |
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