Show data table
| 1992 | 606M | 2002 | 564M | 2012 | 2.26B |
| 1993 | 374M | 2003 | 673M | 2013 | 1.96B |
| 1994 | 433M | 2004 | 858M | 2014 | 2.6B |
| 1995 | 483M | 2005 | 850M | 2015 | 2.02B |
| 1996 | 579M | 2006 | 937M | 2016 | 2.21B |
| 1997 | 594M | 2007 | 1.02B | 2017 | 1.9B |
| 1998 | 626M | 2008 | 923M | 2018 | 2.01B |
| 1999 | 614M | 2009 | 1.3B | 2019 | 1.98B |
| 2000 | 547M | 2010 | 1.59B | | |
| 2001 | 582M | 2011 | 2.06B | | |
Show data table
| 1992 | 1.7B | 2002 | 7.88B | 2012 | 34.7B |
| 1993 | 1.96B | 2003 | 9.35B | 2013 | 30.1B |
| 1994 | 2.67B | 2004 | 11.8B | 2014 | 40B |
| 1995 | 3.05B | 2005 | 13.1B | 2015 | 31B |
| 1996 | 3.68B | 2006 | 14.4B | 2016 | 33.4B |
| 1997 | 4.14B | 2007 | 15.7B | 2017 | 28.7B |
| 1998 | 4.61B | 2008 | 14.2B | 2018 | 30.2B |
| 1999 | 5.01B | 2009 | 19.9B | 2019 | 29.9B |
| 2000 | 5.26B | 2010 | 24.4B | | |
| 2001 | 6.59B | 2011 | 31.7B | | |
Show data table
| 1992 | 15B | 2002 | 24.8B | 2012 | 32.3B |
| 1993 | 17B | 2003 | 24.1B | 2013 | 29B |
| 1994 | 20.5B | 2004 | 24.5B | 2014 | 37.9B |
| 1995 | 21B | 2005 | 25.1B | 2015 | 30.1B |
| 1996 | 22.9B | 2006 | 24.9B | 2016 | 32.3B |
| 1997 | 24.7B | 2007 | 25.2B | 2017 | 29.1B |
| 1998 | 25.2B | 2008 | 20.3B | 2018 | 32.9B |
| 1999 | 25.2B | 2009 | 22.8B | 2019 | 34.1B |
| 2000 | 22.1B | 2010 | 25.3B | | |
| 2001 | 24.1B | 2011 | 31.7B | | |