| Year | Value | | 2022 | 2,002,225 | | 2021 | 1,988,554 | | 2020 | 1,972,418 | | 2019 | 1,959,794 | | 2018 | 1,952,183 | | 2017 | 1,952,039 | | 2016 | 1,958,991 | | 2015 | 1,974,933 | | 2014 | 1,996,078 | | 2013 | 2,016,956 | | 2012 | 2,032,304 | | 2011 | 2,032,746 | | 2010 | 1,973,551 | | 2009 | 1,860,354 | | 2008 | 1,740,400 | | 2007 | 1,609,513 | | 2006 | 1,467,743 | | 2005 | 1,374,109 | | 2004 | 1,341,472 | | 2003 | 1,319,181 | | 2002 | 1,307,786 | | 2001 | 1,321,235 | | 2000 | 1,342,930 | | 1999 | 1,355,341 | | 1998 | 1,365,622 | | 1997 | 1,381,797 | | 1996 | 1,401,562 | | 1995 | 1,421,786 | | 1994 | 1,433,202 | | 1993 | 1,436,200 | | 1992 | 1,433,056 | | 1991 | 1,422,003 | | 1990 | 1,404,080 | | 1989 | 1,392,607 | | 1988 | 1,383,987 | | 1987 | 1,378,211 | | 1986 | 1,380,407 | | 1985 | 1,388,359 | | 1984 | 1,347,906 | | 1983 | 1,246,599 | | 1982 | 1,122,630 | | 1981 | 977,161 | | 1980 | 835,227 | | 1979 | 802,401 | | 1978 | 879,536 | | 1977 | 983,286 | | 1976 | 1,097,135 | | 1975 | 1,198,685 | | 1974 | 1,247,631 | | 1973 | 1,251,596 | | 1972 | 1,248,828 | | 1971 | 1,251,202 | | 1970 | 1,255,330 | | 1969 | 1,253,772 | | 1968 | 1,251,935 | | 1967 | 1,252,752 | | 1966 | 1,254,456 | | 1965 | 1,247,968 | | 1964 | 1,234,147 | | 1963 | 1,211,555 | | 1962 | 1,176,263 | | 1961 | 1,131,414 | | 1960 | 1,075,511 |
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