| Year | Value | | 2022 | 6,014,642 | | 2021 | 5,926,491 | | 2020 | 5,825,584 | | 2019 | 5,775,830 | | 2018 | 5,720,892 | | 2017 | 5,719,665 | | 2016 | 5,729,569 | | 2015 | 5,714,890 | | 2014 | 5,737,961 | | 2013 | 5,692,052 | | 2012 | 5,797,502 | | 2011 | 5,725,447 | | 2010 | 5,599,286 | | 2009 | 5,354,554 | | 2008 | 5,211,207 | | 2007 | 5,037,650 | | 2006 | 4,868,916 | | 2005 | 4,754,453 | | 2004 | 4,524,750 | | 2003 | 4,060,829 | | 2002 | 3,790,000 | | 2001 | 3,593,000 | | 2000 | 3,224,000 | | 1999 | 2,664,000 | | 1998 | 2,072,000 | | 1997 | 1,676,763 | | 1996 | 1,261,445 | | 1995 | 981,305 | | 1994 | 588,478 | | 1993 | 371,403 | | 1992 | 282,918 | | 1991 | 234,423 | | 1990 | 196,828 | | 1989 | 167,651 | | 1988 | 152,193 | | 1987 | 120,029 | | 1986 | 87,061 | | 1985 | 63,075 | | 1984 | 39,050 | | 1983 | 23,473 | | 1982 | 11,059 | | 1981 | 1,670 |
|