Show data table
| 1995 | 3.35B | 2006 | 6.78B | 2017 | 14.2B |
| 1996 | 3.42B | 2007 | 7.97B | 2018 | 16.2B |
| 1997 | 3.46B | 2008 | 9.17B | 2019 | 16.3B |
| 1998 | 3.67B | 2009 | 8.76B | 2020 | 16.4B |
| 1999 | 3.83B | 2010 | 9.1B | 2021 | 19.7B |
| 2000 | 4.04B | 2011 | 9.79B | 2022 | 19B |
| 2001 | 4.07B | 2012 | 9.62B | 2023 | 22.6B |
| 2002 | 4.46B | 2013 | 10.8B | 2024 | 25B |
| 2003 | 5.43B | 2014 | 11.9B | 2025 | 27.8B |
| 2004 | 6.11B | 2015 | 11.3B | 2026 | 30.7B |
| 2005 | 6.39B | 2016 | 12B | | |
Show data table
| 1995 | 2.76B | 2006 | 5.38B | 2017 | 12.5B |
| 1996 | 2.87B | 2007 | 5.78B | 2018 | 13.7B |
| 1997 | 3.11B | 2008 | 6.24B | 2019 | 14.6B |
| 1998 | 3.32B | 2009 | 6.29B | 2020 | 14.4B |
| 1999 | 3.55B | 2010 | 6.86B | 2021 | 16.7B |
| 2000 | 4.12B | 2011 | 7.03B | 2022 | 18B |
| 2001 | 4.27B | 2012 | 7.48B | 2023 | 20.9B |
| 2002 | 4.5B | 2013 | 8.13B | 2024 | 23.1B |
| 2003 | 4.76B | 2014 | 8.95B | 2025 | 24.6B |
| 2004 | 4.9B | 2015 | 10.2B | 2026 | 26B |
| 2005 | 5.14B | 2016 | 10.9B | | |
Show data table
| 2000 | 6.7B | 2009 | 8.1B | 2018 | 14.3B |
| 2001 | 6.65B | 2010 | 8.6B | 2019 | 14.9B |
| 2002 | 6.83B | 2011 | 8.69B | 2020 | 14.4B |
| 2003 | 7.09B | 2012 | 9.04B | 2021 | 16.3B |
| 2004 | 7.11B | 2013 | 9.61B | 2022 | 16.7B |
| 2005 | 7.32B | 2014 | 10.3B | 2023 | 18.5B |
| 2006 | 7.49B | 2015 | 11.3B | 2024 | 19.6B |
| 2007 | 7.87B | 2016 | 11.8B | 2025 | 20.4B |
| 2008 | 8.21B | 2017 | 13.3B | 2026 | 21.2B |