Year | Value | 2023 | 29,158,831 | 2022 | 28,641,414 | 2021 | 27,176,983 | 2020 | 27,169,143 | 2019 | 28,702,961 | 2018 | 28,610,021 | 2017 | 28,100,798 | 2016 | 27,040,336 | 2015 | 25,883,066 | 2014 | 24,780,719 | 2013 | 24,633,773 | 2012 | 24,358,270 | 2011 | 23,747,702 | 2010 | 24,374,967 | 2009 | 24,401,195 | 2008 | 23,395,023 | 2007 | 24,076,472 | 2006 | 23,912,566 | 2005 | 23,637,285 | 2004 | 22,728,486 | 2003 | 21,807,454 | 2002 | 21,067,246 | 2001 | 20,310,914 | 2000 | 19,362,019 | 1999 | 18,444,413 | 1998 | 17,569,208 | 1997 | 16,738,211 | 1996 | 16,004,639 | 1995 | 15,680,499 | 1994 | 15,410,031 | 1993 | 15,456,580 | 1992 | 15,536,859 | 1991 | 15,277,280 |
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