Show data table
| 1980 | 3.75B | 1996 | 7.36B | 2012 | 32B |
| 1981 | 4.23B | 1997 | 7.63B | 2013 | 33.8B |
| 1982 | 4.45B | 1998 | 7.29B | 2014 | 34.8B |
| 1983 | 4.55B | 1999 | 7.91B | 2015 | 32.5B |
| 1984 | 4.73B | 2000 | 9.45B | 2016 | 33.9B |
| 1985 | 4.46B | 2001 | 9.58B | 2017 | 37.2B |
| 1986 | 3.49B | 2002 | 10B | 2018 | 39.6B |
| 1987 | 3.78B | 2003 | 11.5B | 2019 | 40.4B |
| 1988 | 4.67B | 2004 | 13.7B | 2020 | 35.8B |
| 1989 | 4.87B | 2005 | 16.6B | 2021 | 40.8B |
| 1990 | 5.18B | 2006 | 19.3B | 2022 | 46.5B |
| 1991 | 5.43B | 2007 | 22.7B | 2023 | 46.2B |
| 1992 | 5.67B | 2008 | 26.8B | 2024 | 47.2B |
| 1993 | 6.24B | 2009 | 23.9B | 2025 | 47.5B |
| 1994 | 6.68B | 2010 | 26.8B | 2026 | 48.8B |
| 1995 | 7.08B | 2011 | 29.9B | | |
Show data table
| 1980 | 1.41B | 1996 | 2.77B | 2012 | 12B |
| 1981 | 1.59B | 1997 | 2.87B | 2013 | 12.7B |
| 1982 | 1.67B | 1998 | 2.74B | 2014 | 13.1B |
| 1983 | 1.71B | 1999 | 2.97B | 2015 | 12.2B |
| 1984 | 1.78B | 2000 | 3.55B | 2016 | 12.7B |
| 1985 | 1.68B | 2001 | 3.6B | 2017 | 14B |
| 1986 | 1.31B | 2002 | 3.76B | 2018 | 14.9B |
| 1987 | 1.42B | 2003 | 4.34B | 2019 | 15.2B |
| 1988 | 1.76B | 2004 | 5.16B | 2020 | 13.5B |
| 1989 | 1.83B | 2005 | 6.26B | 2021 | 15.4B |
| 1990 | 1.95B | 2006 | 7.25B | 2022 | 17.5B |
| 1991 | 2.04B | 2007 | 8.52B | 2023 | 17.4B |
| 1992 | 2.13B | 2008 | 10.1B | 2024 | 17.8B |
| 1993 | 2.35B | 2009 | 8.99B | 2025 | 17.9B |
| 1994 | 2.51B | 2010 | 10.1B | 2026 | 18.4B |
| 1995 | 2.66B | 2011 | 11.2B | | |
Show data table
| 1980 | 2.89B | 1996 | 4.91B | 2012 | 10.7B |
| 1981 | 2.97B | 1997 | 5.03B | 2013 | 11.2B |
| 1982 | 3.16B | 1998 | 5.27B | 2014 | 11.7B |
| 1983 | 3.38B | 1999 | 5.59B | 2015 | 12B |
| 1984 | 3.52B | 2000 | 5.98B | 2016 | 12.5B |
| 1985 | 3.49B | 2001 | 6.13B | 2017 | 13.1B |
| 1986 | 3.51B | 2002 | 6.33B | 2018 | 13.4B |
| 1987 | 3.46B | 2003 | 6.73B | 2019 | 13.6B |
| 1988 | 3.67B | 2004 | 7.2B | 2020 | 12.8B |
| 1989 | 3.71B | 2005 | 7.69B | 2021 | 13.4B |
| 1990 | 3.84B | 2006 | 8.19B | 2022 | 14.2B |
| 1991 | 3.93B | 2007 | 8.87B | 2023 | 14.8B |
| 1992 | 4.2B | 2008 | 9.42B | 2024 | 15.2B |
| 1993 | 4.52B | 2009 | 9.66B | 2025 | 15.7B |
| 1994 | 4.67B | 2010 | 10.1B | 2026 | 15.6B |
| 1995 | 4.76B | 2011 | 10.3B | | |