| Year | Value | | 2022 | 1,817,878 | | 2021 | 1,785,840 | | 2020 | 1,753,513 | | 2019 | 1,724,860 | | 2018 | 1,697,963 | | 2017 | 1,673,563 | | 2016 | 1,657,572 | | 2015 | 1,644,779 | | 2014 | 1,636,349 | | 2013 | 1,622,649 | | 2012 | 1,600,542 | | 2011 | 1,577,851 | | 2010 | 1,547,741 | | 2009 | 1,515,585 | | 2008 | 1,476,246 | | 2007 | 1,436,133 | | 2006 | 1,412,834 | | 2005 | 1,388,443 | | 2004 | 1,353,934 | | 2003 | 1,298,813 | | 2002 | 1,245,585 | | 2001 | 1,202,597 | | 2000 | 1,168,024 | | 1999 | 1,153,127 | | 1998 | 1,141,498 | | 1997 | 1,127,830 | | 1996 | 1,113,928 | | 1995 | 1,060,244 | | 1994 | 1,002,615 | | 1993 | 971,841 | | 1992 | 941,490 | | 1991 | 998,866 | | 1990 | 1,052,778 | | 1989 | 1,029,276 | | 1988 | 1,004,548 | | 1987 | 979,510 | | 1986 | 954,625 | | 1985 | 929,960 | | 1984 | 905,768 | | 1983 | 881,487 | | 1982 | 857,745 | | 1981 | 834,674 | | 1980 | 812,236 | | 1979 | 790,775 | | 1978 | 770,202 | | 1977 | 750,299 | | 1976 | 731,048 | | 1975 | 712,442 | | 1974 | 694,267 | | 1973 | 676,310 | | 1972 | 658,748 | | 1971 | 641,737 | | 1970 | 625,299 | | 1969 | 609,510 | | 1968 | 594,356 | | 1967 | 579,689 | | 1966 | 565,379 | | 1965 | 551,436 | | 1964 | 537,919 | | 1963 | 524,886 | | 1962 | 512,361 | | 1961 | 500,395 | | 1960 | 489,060 |
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