Show data table
| 1980 | 3.76B | 1996 | 9.2B | 2012 | 41.6B |
| 1981 | 4.25B | 1997 | 10.1B | 2013 | 46.9B |
| 1982 | 4.7B | 1998 | 11B | 2014 | 51.4B |
| 1983 | 4.83B | 1999 | 11.7B | 2015 | 55.8B |
| 1984 | 5.04B | 2000 | 12B | 2016 | 59.8B |
| 1985 | 5.33B | 2001 | 12.3B | 2017 | 64.3B |
| 1986 | 5.54B | 2002 | 12.8B | 2018 | 67.3B |
| 1987 | 5.56B | 2003 | 13.6B | 2019 | 69.8B |
| 1988 | 4.81B | 2004 | 15.1B | 2020 | 57.1B |
| 1989 | 4.82B | 2005 | 16.6B | 2021 | 67.4B |
| 1990 | 5.24B | 2006 | 18.7B | 2022 | 76.5B |
| 1991 | 5.76B | 2007 | 21.7B | 2023 | 83.8B |
| 1992 | 6.55B | 2008 | 25.7B | 2024 | 86.5B |
| 1993 | 7.16B | 2009 | 27.8B | 2025 | 90.5B |
| 1994 | 7.63B | 2010 | 30.2B | 2026 | 95B |
| 1995 | 7.8B | 2011 | 35.7B | | |
Show data table
| 1980 | 3.76B | 1996 | 9.2B | 2012 | 41.6B |
| 1981 | 4.25B | 1997 | 10.1B | 2013 | 46.9B |
| 1982 | 4.7B | 1998 | 11B | 2014 | 51.4B |
| 1983 | 4.83B | 1999 | 11.7B | 2015 | 55.8B |
| 1984 | 5.04B | 2000 | 12B | 2016 | 59.8B |
| 1985 | 5.33B | 2001 | 12.3B | 2017 | 64.3B |
| 1986 | 5.54B | 2002 | 12.8B | 2018 | 67.3B |
| 1987 | 5.56B | 2003 | 13.6B | 2019 | 69.8B |
| 1988 | 4.81B | 2004 | 15.1B | 2020 | 57.1B |
| 1989 | 4.82B | 2005 | 16.6B | 2021 | 67.4B |
| 1990 | 5.24B | 2006 | 18.7B | 2022 | 76.5B |
| 1991 | 5.76B | 2007 | 21.7B | 2023 | 83.8B |
| 1992 | 6.55B | 2008 | 25.7B | 2024 | 86.5B |
| 1993 | 7.16B | 2009 | 27.8B | 2025 | 90.5B |
| 1994 | 7.63B | 2010 | 30.2B | 2026 | 95B |
| 1995 | 7.8B | 2011 | 35.7B | | |
Show data table
| 1980 | 10.5B | 1996 | 16.9B | 2012 | 50B |
| 1981 | 11.5B | 1997 | 18.2B | 2013 | 53.2B |
| 1982 | 12.1B | 1998 | 19.8B | 2014 | 55.7B |
| 1983 | 11.6B | 1999 | 20.8B | 2015 | 58.6B |
| 1984 | 11.9B | 2000 | 21.7B | 2016 | 61.3B |
| 1985 | 12.5B | 2001 | 21.9B | 2017 | 64.8B |
| 1986 | 12.9B | 2002 | 22.4B | 2018 | 67.3B |
| 1987 | 12.7B | 2003 | 23.6B | 2019 | 69.4B |
| 1988 | 11B | 2004 | 25.5B | 2020 | 57B |
| 1989 | 11.2B | 2005 | 27.6B | 2021 | 66.4B |
| 1990 | 12.1B | 2006 | 30.3B | 2022 | 73.8B |
| 1991 | 13.2B | 2007 | 34.3B | 2023 | 79B |
| 1992 | 14.3B | 2008 | 37.8B | 2024 | 81.2B |
| 1993 | 15.1B | 2009 | 38.4B | 2025 | 84.8B |
| 1994 | 15.5B | 2010 | 40.8B | 2026 | 88B |
| 1995 | 15.8B | 2011 | 45.6B | | |