Year | Value | 2021 | 1,081,478 | 2020 | 753,114 | 2019 | 2,114,417 | 2018 | 2,099,102 | 2017 | 1,901,012 | 2016 | 1,845,726 | 2015 | 1,830,972 | 2014 | 1,710,624 | 2013 | 1,555,788 | 2012 | 781,146 | 2011 | 785,200 | 2010 | 786,920 | 2009 | 681,482 | 2008 | 1,059,848 | 2007 | 1,039,067 | 2006 | 927,738 | 2005 | 851,136 | 2004 | 855,840 | 2003 | 853,903 | 2002 | 822,533 | 2001 | 885,852 | 2000 | 870,831 | 1999 | 842,700 | 1998 | 701,400 | 1997 | 559,800 | 1996 | 639,100 | 1995 | 569,700 | 1994 | 532,500 | 1993 | 470,500 | 1992 | 460,600 | 1991 | 405,700 | 1990 | 409,300 | 1989 | 296,000 | 1988 | 293,900 | 1987 | 272,900 | 1986 | 247,700 | 1985 | 239,400 | 1984 | 243,200 | 1983 | 224,100 | 1982 | 203,700 | 1981 | 163,200 | 1980 | 161,500 | 1979 | 300,000 | 1978 | 290,000 | 1977 | 260,000 | 1976 | 250,000 | 1975 | 230,000 | 1974 | 220,600 | 1973 | 218,100 | 1972 | 211,300 | 1971 | 250,000 | 1970 | 167,000 |
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