| Year | Value | | 2022 | 3,978,980 | | 2021 | 4,125,694 | | 2020 | 4,290,148 | | 2019 | 4,468,006 | | 2018 | 4,655,399 | | 2017 | 4,813,261 | | 2016 | 4,908,686 | | 2015 | 4,935,238 | | 2014 | 4,889,385 | | 2013 | 4,789,341 | | 2012 | 4,701,469 | | 2011 | 4,537,401 | | 2010 | 4,371,403 | | 2009 | 4,303,475 | | 2008 | 4,226,982 | | 2007 | 4,109,624 | | 2006 | 4,079,266 | | 2005 | 4,075,645 | | 2004 | 3,996,974 | | 2003 | 3,949,736 | | 2002 | 3,910,428 | | 2001 | 3,891,082 | | 2000 | 3,915,295 | | 1999 | 3,957,203 | | 1998 | 4,007,409 | | 1997 | 4,111,470 | | 1996 | 4,272,413 | | 1995 | 4,469,170 | | 1994 | 4,775,862 | | 1993 | 5,161,149 | | 1992 | 5,493,349 | | 1991 | 5,587,578 | | 1990 | 5,401,601 | | 1989 | 5,114,970 | | 1988 | 4,820,042 | | 1987 | 4,562,250 | | 1986 | 4,497,156 | | 1985 | 4,606,872 | | 1984 | 4,602,740 | | 1983 | 4,469,227 | | 1982 | 4,344,726 | | 1981 | 4,247,450 | | 1980 | 4,183,613 | | 1979 | 4,184,210 | | 1978 | 4,215,292 | | 1977 | 4,213,152 | | 1976 | 4,172,709 | | 1975 | 4,116,040 | | 1974 | 4,057,758 | | 1973 | 3,995,778 | | 1972 | 3,919,106 | | 1971 | 3,834,843 | | 1970 | 3,706,474 | | 1969 | 3,584,543 | | 1968 | 3,415,982 | | 1967 | 3,209,471 | | 1966 | 2,972,330 | | 1965 | 2,754,380 | | 1964 | 2,568,834 | | 1963 | 2,419,261 | | 1962 | 2,328,665 | | 1961 | 2,291,485 | | 1960 | 2,271,812 |
|