Show data table
| 1980 | 4.56B | 1996 | 6.06B | 2012 | 17.2B |
| 1981 | 4.11B | 1997 | 5.67B | 2013 | 17.6B |
| 1982 | 3.85B | 1998 | 4.77B | 2014 | 18.2B |
| 1983 | 3.69B | 1999 | 4.97B | 2015 | 14.4B |
| 1984 | 3.55B | 2000 | 5.4B | 2016 | 14B |
| 1985 | 3.74B | 2001 | 5.02B | 2017 | 14.9B |
| 1986 | 4.89B | 2002 | 5.33B | 2018 | 16.8B |
| 1987 | 3.7B | 2003 | 6.51B | 2019 | 16.9B |
| 1988 | 4.08B | 2004 | 7.77B | 2020 | 15.4B |
| 1989 | 4.46B | 2005 | 9.47B | 2021 | 19.5B |
| 1990 | 6.34B | 2006 | 10.2B | 2022 | 20.5B |
| 1991 | 5.75B | 2007 | 12.5B | 2023 | 20.1B |
| 1992 | 5.96B | 2008 | 15.6B | 2024 | 20.9B |
| 1993 | 5.76B | 2009 | 12.2B | 2025 | 21.6B |
| 1994 | 4.46B | 2010 | 14.4B | 2026 | 23.4B |
| 1995 | 5.28B | 2011 | 18.2B | | |
Show data table
| 1980 | 963B | 1996 | 3.1T | 2012 | 8.77T |
| 1981 | 1.12T | 1997 | 3.31T | 2013 | 8.69T |
| 1982 | 1.27T | 1998 | 2.82T | 2014 | 8.99T |
| 1983 | 1.41T | 1999 | 3.06T | 2015 | 8.5T |
| 1984 | 1.55T | 2000 | 3.84T | 2016 | 8.31T |
| 1985 | 1.68T | 2001 | 3.68T | 2017 | 8.67T |
| 1986 | 1.69T | 2002 | 3.7T | 2018 | 9.34T |
| 1987 | 1.11T | 2003 | 3.78T | 2019 | 9.89T |
| 1988 | 1.21T | 2004 | 4.1T | 2020 | 8.83T |
| 1989 | 1.42T | 2005 | 4.99T | 2021 | 10.78T |
| 1990 | 1.73T | 2006 | 5.31T | 2022 | 12.75T |
| 1991 | 1.62T | 2007 | 5.96T | 2023 | 12.17T |
| 1992 | 1.58T | 2008 | 6.94T | 2024 | 12.67T |
| 1993 | 1.63T | 2009 | 5.74T | 2025 | 12.56T |
| 1994 | 2.48T | 2010 | 7.11T | 2026 | 13T |
| 1995 | 2.64T | 2011 | 8.58T | | |
Show data table
| 1980 | 2.6T | 1996 | 3.68T | 2012 | 4.67T |
| 1981 | 2.49T | 1997 | 3.9T | 2013 | 4.93T |
| 1982 | 2.59T | 1998 | 4.03T | 2014 | 5.15T |
| 1983 | 2.65T | 1999 | 3.67T | 2015 | 5.35T |
| 1984 | 2.78T | 2000 | 3.6T | 2016 | 5.46T |
| 1985 | 2.94T | 2001 | 3.68T | 2017 | 5.48T |
| 1986 | 2.87T | 2002 | 3.67T | 2018 | 5.53T |
| 1987 | 2.43T | 2003 | 3.75T | 2019 | 5.75T |
| 1988 | 2.52T | 2004 | 3.78T | 2020 | 5.64T |
| 1989 | 2.91T | 2005 | 3.93T | 2021 | 5.72T |
| 1990 | 3.05T | 2006 | 3.78T | 2022 | 5.9T |
| 1991 | 3.24T | 2007 | 4.03T | 2023 | 6.04T |
| 1992 | 3.14T | 2008 | 3.91T | 2024 | 6.25T |
| 1993 | 3.27T | 2009 | 3.86T | 2025 | 6.4T |
| 1994 | 3.39T | 2010 | 4.14T | 2026 | 6.58T |
| 1995 | 3.56T | 2011 | 4.44T | | |