Show data table
| 1980 | 6.43B | 1996 | 20.5B | 2012 | 59.8B |
| 1981 | 5.55B | 1997 | 18.4B | 2013 | 65.2B |
| 1982 | 4.56B | 1998 | 19.3B | 2014 | 68.8B |
| 1983 | 4.47B | 1999 | 21.1B | 2015 | 60.1B |
| 1984 | 4.39B | 2000 | 21.2B | 2016 | 62.2B |
| 1985 | 4.54B | 2001 | 21.4B | 2017 | 65.7B |
| 1986 | 6.61B | 2002 | 23.6B | 2018 | 71.1B |
| 1987 | 8.21B | 2003 | 29.7B | 2019 | 69.9B |
| 1988 | 9.3B | 2004 | 35B | 2020 | 73.6B |
| 1989 | 9.9B | 2005 | 37.7B | 2021 | 86.4B |
| 1990 | 12.6B | 2006 | 42.9B | 2022 | 80.9B |
| 1991 | 13.7B | 2007 | 51.6B | 2023 | 88.8B |
| 1992 | 15.3B | 2008 | 58.8B | 2024 | 93.3B |
| 1993 | 15.7B | 2009 | 54.4B | 2025 | 101B |
| 1994 | 17.5B | 2010 | 56.3B | 2026 | 110B |
| 1995 | 20.6B | 2011 | 61.7B | | |
Show data table
| 1980 | 4.66B | 1996 | 15.7B | 2012 | 46.5B |
| 1981 | 5.09B | 1997 | 16.3B | 2013 | 49.1B |
| 1982 | 5.14B | 1998 | 17.3B | 2014 | 51.8B |
| 1983 | 5.65B | 1999 | 19.8B | 2015 | 54.1B |
| 1984 | 6.27B | 2000 | 23B | 2016 | 56.2B |
| 1985 | 6.64B | 2001 | 23.9B | 2017 | 58.2B |
| 1986 | 7.3B | 2002 | 25B | 2018 | 60.2B |
| 1987 | 7.59B | 2003 | 26.2B | 2019 | 62.4B |
| 1988 | 8.46B | 2004 | 28.2B | 2020 | 64.5B |
| 1989 | 9.66B | 2005 | 30.3B | 2021 | 73B |
| 1990 | 10.4B | 2006 | 34.2B | 2022 | 76.7B |
| 1991 | 11.5B | 2007 | 37.6B | 2023 | 82.1B |
| 1992 | 12.2B | 2008 | 40B | 2024 | 86.2B |
| 1993 | 13.5B | 2009 | 39.1B | 2025 | 89.5B |
| 1994 | 14.5B | 2010 | 42.4B | 2026 | 93.6B |
| 1995 | 15B | 2011 | 44.3B | | |
Show data table
| 1980 | 13.5B | 1996 | 27.4B | 2012 | 50B |
| 1981 | 13.6B | 1997 | 29.1B | 2013 | 51.6B |
| 1982 | 13.8B | 1998 | 30.9B | 2014 | 52.9B |
| 1983 | 14B | 1999 | 33.6B | 2015 | 54.1B |
| 1984 | 14.7B | 2000 | 36.4B | 2016 | 56.8B |
| 1985 | 15.5B | 2001 | 37.5B | 2017 | 57.6B |
| 1986 | 17.1B | 2002 | 38.7B | 2018 | 58.5B |
| 1987 | 17.7B | 2003 | 39.7B | 2019 | 60.1B |
| 1988 | 19.3B | 2004 | 41.4B | 2020 | 59.8B |
| 1989 | 21.1B | 2005 | 42.4B | 2021 | 64B |
| 1990 | 22.3B | 2006 | 45B | 2022 | 63.3B |
| 1991 | 24.2B | 2007 | 48.6B | 2023 | 63.3B |
| 1992 | 24.6B | 2008 | 48.5B | 2024 | 63.5B |
| 1993 | 25.7B | 2009 | 46.9B | 2025 | 64B |
| 1994 | 26.6B | 2010 | 48.7B | 2026 | 65B |
| 1995 | 27B | 2011 | 49.2B | | |