| Year | Value | | 2022 | 3,997,373 | | 2021 | 3,962,798 | | 2020 | 3,955,075 | | 2019 | 3,866,147 | | 2018 | 3,801,914 | | 2017 | 3,753,089 | | 2016 | 3,723,755 | | 2015 | 3,736,264 | | 2014 | 3,766,288 | | 2013 | 3,805,855 | | 2012 | 3,900,288 | | 2011 | 4,049,143 | | 2010 | 4,234,321 | | 2009 | 4,516,042 | | 2008 | 4,879,011 | | 2007 | 5,195,567 | | 2006 | 5,285,781 | | 2005 | 5,110,142 | | 2004 | 4,831,520 | | 2003 | 4,543,225 | | 2002 | 4,283,160 | | 2001 | 4,214,717 | | 2000 | 4,326,537 | | 1999 | 4,342,259 | | 1998 | 4,224,322 | | 1997 | 4,100,539 | | 1996 | 3,997,987 | | 1995 | 3,925,452 | | 1994 | 3,916,370 | | 1993 | 3,938,218 | | 1992 | 3,925,238 | | 1991 | 3,869,632 | | 1990 | 3,797,570 | | 1989 | 3,733,561 | | 1988 | 3,670,283 | | 1987 | 3,602,656 | | 1986 | 3,530,240 | | 1985 | 3,445,965 | | 1984 | 3,329,637 | | 1983 | 3,170,578 | | 1982 | 2,971,974 | | 1981 | 2,749,169 | | 1980 | 2,542,497 | | 1979 | 2,366,733 | | 1978 | 2,226,259 | | 1977 | 2,139,594 | | 1976 | 2,097,712 | | 1975 | 2,069,174 | | 1974 | 2,059,378 | | 1973 | 2,075,473 | | 1972 | 2,084,846 | | 1971 | 2,080,680 | | 1970 | 2,049,799 | | 1969 | 2,035,283 | | 1968 | 2,015,320 | | 1967 | 1,995,612 | | 1966 | 1,958,936 | | 1965 | 1,911,301 | | 1964 | 1,863,593 | | 1963 | 1,823,173 | | 1962 | 1,794,807 | | 1961 | 1,787,133 | | 1960 | 1,789,539 |
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