| Year | Value | | 2022 | 4,752,109 | | 2021 | 4,655,360 | | 2020 | 4,618,225 | | 2019 | 4,676,977 | | 2018 | 4,835,321 | | 2017 | 5,072,389 | | 2016 | 5,354,034 | | 2015 | 5,667,771 | | 2014 | 5,945,779 | | 2013 | 6,127,981 | | 2012 | 6,230,548 | | 2011 | 6,250,795 | | 2010 | 6,190,831 | | 2009 | 6,138,066 | | 2008 | 6,071,459 | | 2007 | 5,975,412 | | 2006 | 5,898,462 | | 2005 | 5,802,831 | | 2004 | 5,696,685 | | 2003 | 5,567,997 | | 2002 | 5,382,179 | | 2001 | 5,151,718 | | 2000 | 4,748,442 | | 1999 | 4,104,783 | | 1998 | 3,450,818 | | 1997 | 2,985,435 | | 1996 | 2,853,215 | | 1995 | 3,144,118 | | 1994 | 3,770,830 | | 1993 | 4,564,424 | | 1992 | 5,286,285 | | 1991 | 5,619,057 | | 1990 | 5,584,413 | | 1989 | 5,323,674 | | 1988 | 4,891,506 | | 1987 | 4,554,609 | | 1986 | 4,395,055 | | 1985 | 4,442,338 | | 1984 | 4,706,869 | | 1983 | 5,099,880 | | 1982 | 5,409,271 | | 1981 | 5,600,079 | | 1980 | 5,680,577 | | 1979 | 5,613,802 | | 1978 | 5,452,299 | | 1977 | 5,194,155 | | 1976 | 4,834,267 | | 1975 | 4,411,019 | | 1974 | 4,017,893 | | 1973 | 3,728,702 | | 1972 | 3,473,688 | | 1971 | 3,277,055 | | 1970 | 3,272,223 | | 1969 | 3,479,350 | | 1968 | 3,696,431 | | 1967 | 3,970,222 | | 1966 | 4,319,679 | | 1965 | 4,526,655 | | 1964 | 4,504,018 | | 1963 | 4,378,475 | | 1962 | 4,240,421 | | 1961 | 4,104,206 | | 1960 | 3,952,143 |
|