Show data table
| 1980 | 6.34B | 1996 | 5.86B | 2012 | 27.1B |
| 1981 | 7.11B | 1997 | 5.84B | 2013 | 28.6B |
| 1982 | 8.28B | 1998 | 6.15B | 2014 | 29.5B |
| 1983 | 7.9B | 1999 | 6.93B | 2015 | 26.8B |
| 1984 | 7.89B | 2000 | 8.29B | 2016 | 23.6B |
| 1985 | 7.5B | 2001 | 8.96B | 2017 | 23.8B |
| 1986 | 4.88B | 2002 | 9.15B | 2018 | 23.9B |
| 1987 | 4.88B | 2003 | 11.5B | 2019 | 23.5B |
| 1988 | 4.57B | 2004 | 13.5B | 2020 | 20.9B |
| 1989 | 4.4B | 2005 | 16.2B | 2021 | 24.2B |
| 1990 | 5.16B | 2006 | 18.6B | 2022 | 28.3B |
| 1991 | 5.4B | 2007 | 21.9B | 2023 | 25B |
| 1992 | 5.53B | 2008 | 28.2B | 2024 | 25.6B |
| 1993 | 4.66B | 2009 | 19.5B | 2025 | 25.9B |
| 1994 | 5.03B | 2010 | 22.5B | 2026 | 26.8B |
| 1995 | 5.42B | 2011 | 25.8B | | |
Show data table
| 1980 | 15.2B | 1996 | 35.2B | 2012 | 175B |
| 1981 | 17.1B | 1997 | 36.5B | 2013 | 184B |
| 1982 | 19.9B | 1998 | 38.7B | 2014 | 189B |
| 1983 | 19B | 1999 | 43.6B | 2015 | 171B |
| 1984 | 18.9B | 2000 | 52.3B | 2016 | 158B |
| 1985 | 18.4B | 2001 | 55.9B | 2017 | 162B |
| 1986 | 17.6B | 2002 | 57.2B | 2018 | 162B |
| 1987 | 17.6B | 2003 | 72.2B | 2019 | 159B |
| 1988 | 17.6B | 2004 | 84.9B | 2020 | 141B |
| 1989 | 18.7B | 2005 | 102B | 2021 | 164B |
| 1990 | 21.9B | 2006 | 117B | 2022 | 191B |
| 1991 | 22.9B | 2007 | 139B | 2023 | 169B |
| 1992 | 23.5B | 2008 | 177B | 2024 | 173B |
| 1993 | 24.9B | 2009 | 123B | 2025 | 175B |
| 1994 | 29.8B | 2010 | 144B | 2026 | 181B |
| 1995 | 32.2B | 2011 | 165B | | |
Show data table
| 1980 | 70.1B | 1996 | 71.5B | 2012 | 175B |
| 1981 | 73.3B | 1997 | 76.9B | 2013 | 180B |
| 1982 | 76.1B | 1998 | 83.1B | 2014 | 187B |
| 1983 | 68.2B | 1999 | 89.8B | 2015 | 186B |
| 1984 | 64.3B | 2000 | 96B | 2016 | 172B |
| 1985 | 61.7B | 2001 | 99.5B | 2017 | 164B |
| 1986 | 59.6B | 2002 | 107B | 2018 | 162B |
| 1987 | 56.9B | 2003 | 121B | 2019 | 163B |
| 1988 | 54.7B | 2004 | 130B | 2020 | 149B |
| 1989 | 54.2B | 2005 | 138B | 2021 | 148B |
| 1990 | 55.1B | 2006 | 158B | 2022 | 149B |
| 1991 | 56.8B | 2007 | 164B | 2023 | 151B |
| 1992 | 62.5B | 2008 | 170B | 2024 | 155B |
| 1993 | 62.1B | 2009 | 162B | 2025 | 156B |
| 1994 | 64.3B | 2010 | 167B | 2026 | 157B |
| 1995 | 66.7B | 2011 | 167B | | |