Show data table
| 1980 | 4.34B | 1996 | 6.3B | 2012 | 17.7B |
| 1981 | 3.93B | 1997 | 5.87B | 2013 | 18.9B |
| 1982 | 3.85B | 1998 | 6.42B | 2014 | 19.8B |
| 1983 | 3.44B | 1999 | 6.6B | 2015 | 17.8B |
| 1984 | 3.35B | 2000 | 6.02B | 2016 | 19B |
| 1985 | 3.67B | 2001 | 6.51B | 2017 | 21B |
| 1986 | 5.19B | 2002 | 7B | 2018 | 23.1B |
| 1987 | 6.24B | 2003 | 8.77B | 2019 | 23.4B |
| 1988 | 6.17B | 2004 | 10.1B | 2020 | 24.6B |
| 1989 | 6.08B | 2005 | 11B | 2021 | 27.5B |
| 1990 | 7.08B | 2006 | 11.7B | 2022 | 27.8B |
| 1991 | 6.96B | 2007 | 14B | 2023 | 30.7B |
| 1992 | 7.44B | 2008 | 16.9B | 2024 | 32.8B |
| 1993 | 7.01B | 2009 | 16.1B | 2025 | 37.1B |
| 1994 | 4.75B | 2010 | 16.1B | 2026 | 40.5B |
| 1995 | 6.03B | 2011 | 17.8B | | |
Show data table
| 1980 | 916B | 1996 | 3.22T | 2012 | 9.02T |
| 1981 | 1.07T | 1997 | 3.42T | 2013 | 9.34T |
| 1982 | 1.27T | 1998 | 3.76T | 2014 | 9.78T |
| 1983 | 1.31T | 1999 | 4.06T | 2015 | 10.51T |
| 1984 | 1.46T | 2000 | 4.27T | 2016 | 11.28T |
| 1985 | 1.65T | 2001 | 4.77T | 2017 | 12.19T |
| 1986 | 1.8T | 2002 | 4.86T | 2018 | 12.84T |
| 1987 | 1.88T | 2003 | 5.08T | 2019 | 13.71T |
| 1988 | 1.84T | 2004 | 5.31T | 2020 | 14.12T |
| 1989 | 1.94T | 2005 | 5.8T | 2021 | 15.26T |
| 1990 | 1.93T | 2006 | 6.11T | 2022 | 17.33T |
| 1991 | 1.96T | 2007 | 6.7T | 2023 | 18.62T |
| 1992 | 1.97T | 2008 | 7.52T | 2024 | 19.9T |
| 1993 | 1.99T | 2009 | 7.59T | 2025 | 21.56T |
| 1994 | 2.64T | 2010 | 7.98T | 2026 | 22.51T |
| 1995 | 3.01T | 2011 | 8.39T | | |
Show data table
| 1980 | 3.48T | 1996 | 5.1T | 2012 | 8.99T |
| 1981 | 3.66T | 1997 | 5.24T | 2013 | 9.2T |
| 1982 | 3.95T | 1998 | 5.55T | 2014 | 9.78T |
| 1983 | 3.74T | 1999 | 5.88T | 2015 | 10.4T |
| 1984 | 3.88T | 2000 | 6.11T | 2016 | 11.06T |
| 1985 | 4T | 2001 | 6.38T | 2017 | 11.88T |
| 1986 | 4.13T | 2002 | 6.38T | 2018 | 12.61T |
| 1987 | 4.38T | 2003 | 6.74T | 2019 | 13.2T |
| 1988 | 4.35T | 2004 | 7.05T | 2020 | 13.37T |
| 1989 | 4.53T | 2005 | 7.35T | 2021 | 14.25T |
| 1990 | 4.5T | 2006 | 7.53T | 2022 | 14.8T |
| 1991 | 4.61T | 2007 | 7.74T | 2023 | 15.43T |
| 1992 | 4.67T | 2008 | 8.03T | 2024 | 16.38T |
| 1993 | 4.73T | 2009 | 8.25T | 2025 | 17.67T |
| 1994 | 4.72T | 2010 | 8.53T | 2026 | 18.05T |
| 1995 | 5.01T | 2011 | 8.64T | | |