Show data table
| 1980 | 428M | 1996 | 977M | 2012 | 2.47B |
| 1981 | 435M | 1997 | 1.03B | 2013 | 2.35B |
| 1982 | 362M | 1998 | 949M | 2014 | 2.48B |
| 1983 | 401M | 1999 | 937M | 2015 | 2.2B |
| 1984 | 360M | 2000 | 922M | 2016 | 2.21B |
| 1985 | 288M | 2001 | 774M | 2017 | 2.42B |
| 1986 | 331M | 2002 | 856M | 2018 | 2.47B |
| 1987 | 434M | 2003 | 1.26B | 2019 | 2.32B |
| 1988 | 496M | 2004 | 1.6B | 2020 | 2.09B |
| 1989 | 519M | 2005 | 1.73B | 2021 | 2.44B |
| 1990 | 635M | 2006 | 1.72B | 2022 | 2.28B |
| 1991 | 743M | 2007 | 1.76B | 2023 | 2.23B |
| 1992 | 863M | 2008 | 1.65B | 2024 | 2.51B |
| 1993 | 865M | 2009 | 1.94B | 2025 | 2.85B |
| 1994 | 915M | 2010 | 2.36B | 2026 | 2.97B |
| 1995 | 1.03B | 2011 | 2.57B | | |
Show data table
| 1980 | 333M | 1996 | 4.2B | 2012 | 21B |
| 1981 | 378M | 1997 | 4.73B | 2013 | 23.8B |
| 1982 | 392M | 1998 | 5.24B | 2014 | 27.4B |
| 1983 | 446M | 1999 | 5.72B | 2015 | 30.4B |
| 1984 | 518M | 2000 | 6.4B | 2016 | 31B |
| 1985 | 631M | 2001 | 7.38B | 2017 | 31.5B |
| 1986 | 751M | 2002 | 8.32B | 2018 | 34B |
| 1987 | 882M | 2003 | 9.01B | 2019 | 34.4B |
| 1988 | 1.13B | 2004 | 10B | 2020 | 34.2B |
| 1989 | 1.36B | 2005 | 11.1B | 2021 | 36.3B |
| 1990 | 1.64B | 2006 | 12.1B | 2022 | 38.7B |
| 1991 | 2.05B | 2007 | 12.5B | 2023 | 41.7B |
| 1992 | 2.46B | 2008 | 14.6B | 2024 | 45.8B |
| 1993 | 2.83B | 2009 | 15.2B | 2025 | 48B |
| 1994 | 3.25B | 2010 | 16.9B | 2026 | 50.5B |
| 1995 | 3.74B | 2011 | 19.1B | | |
Show data table
| 1980 | 5.69B | 1996 | 12.1B | 2012 | 20.6B |
| 1981 | 5.86B | 1997 | 12.5B | 2013 | 20.8B |
| 1982 | 6.19B | 1998 | 12.7B | 2014 | 21.1B |
| 1983 | 6.38B | 1999 | 12.9B | 2015 | 21.9B |
| 1984 | 6.68B | 2000 | 13.4B | 2016 | 22.4B |
| 1985 | 6.88B | 2001 | 13.8B | 2017 | 21.7B |
| 1986 | 7.14B | 2002 | 14.2B | 2018 | 21.4B |
| 1987 | 7.33B | 2003 | 14.8B | 2019 | 21B |
| 1988 | 7.91B | 2004 | 15.1B | 2020 | 19.2B |
| 1989 | 8.38B | 2005 | 15.6B | 2021 | 20.1B |
| 1990 | 8.92B | 2006 | 16.2B | 2022 | 20.4B |
| 1991 | 9.59B | 2007 | 17B | 2023 | 20.9B |
| 1992 | 10.2B | 2008 | 17.5B | 2024 | 21.9B |
| 1993 | 10.6B | 2009 | 17.6B | 2025 | 22.2B |
| 1994 | 11.1B | 2010 | 18.5B | 2026 | 22.5B |
| 1995 | 11.6B | 2011 | 19.6B | | |