Show data table
| 1999 | 46% | 2009 | 38.3% | 2019 | 28.3% |
| 2000 | 47.5% | 2010 | 34.6% | 2020 | 25.7% |
| 2001 | 39.2% | 2011 | 37% | 2021 | 29.1% |
| 2002 | 41.1% | 2012 | 38% | 2022 | 29.1% |
| 2003 | 42.6% | 2013 | 39.3% | 2023 | 28.2% |
| 2004 | 41.2% | 2014 | 40.4% | 2024 | 26.5% |
| 2005 | 44.1% | 2015 | 33% | 2025 | 27.6% |
| 2006 | 46.4% | 2016 | 34.8% | 2026 | 25% |
| 2007 | 42.8% | 2017 | 33.5% | | |
| 2008 | 40.5% | 2018 | 30.6% | | |
Show data table
| 1999 | 12B | 2009 | 29.1B | 2019 | 50.3B |
| 2000 | 14.1B | 2010 | 31.2B | 2020 | 46.3B |
| 2001 | 12.7B | 2011 | 38.5B | 2021 | 63.6B |
| 2002 | 14.3B | 2012 | 41.7B | 2022 | 74.1B |
| 2003 | 16.2B | 2013 | 49B | 2023 | 74.3B |
| 2004 | 18B | 2014 | 56B | 2024 | 69.5B |
| 2005 | 23B | 2015 | 47.5B | 2025 | 74.2B |
| 2006 | 27.7B | 2016 | 57.5B | 2026 | 72.8B |
| 2007 | 28.7B | 2017 | 56.5B | | |
| 2008 | 29.6B | 2018 | 53.5B | | |
Show data table
| 1980 | 34.3% | 1996 | 36.1% | 2012 | 37.1% |
| 1981 | 37.3% | 1997 | 39% | 2013 | 33.5% |
| 1982 | 36.7% | 1998 | 41.8% | 2014 | 36.5% |
| 1983 | 34.4% | 1999 | 40.1% | 2015 | 37.8% |
| 1984 | 34.6% | 2000 | 38.8% | 2016 | 34.1% |
| 1985 | 31.4% | 2001 | 42.1% | 2017 | 34.7% |
| 1986 | 35.5% | 2002 | 45.1% | 2018 | 35.6% |
| 1987 | 35.9% | 2003 | 42.7% | 2019 | 36.9% |
| 1988 | 32.1% | 2004 | 39.8% | 2020 | 36.5% |
| 1989 | 34% | 2005 | 33.8% | 2021 | 31.4% |
| 1990 | 38.9% | 2006 | 33.1% | 2022 | 29.1% |
| 1991 | 41.1% | 2007 | 37.1% | 2023 | 32.4% |
| 1992 | 42.3% | 2008 | 48.1% | 2024 | 33.7% |
| 1993 | 42% | 2009 | 52.1% | 2025 | 35% |
| 1994 | 37.6% | 2010 | 42.6% | 2026 | 35.7% |
| 1995 | 36.1% | 2011 | 37.2% | | |
Show data table
| 1980 | 293M | 1996 | 6.05B | 2012 | 40.7B |
| 1981 | 339M | 1997 | 7.32B | 2013 | 41.7B |
| 1982 | 408M | 1998 | 8.94B | 2014 | 50.6B |
| 1983 | 464M | 1999 | 10.4B | 2015 | 54.4B |
| 1984 | 596M | 2000 | 11.5B | 2016 | 56.3B |
| 1985 | 716M | 2001 | 13.7B | 2017 | 58.4B |
| 1986 | 967M | 2002 | 15.7B | 2018 | 62.4B |
| 1987 | 1.28B | 2003 | 16.3B | 2019 | 65.4B |
| 1988 | 1.73B | 2004 | 17.4B | 2020 | 65.9B |
| 1989 | 2.18B | 2005 | 17.6B | 2021 | 68.7B |
| 1990 | 2.85B | 2006 | 19.7B | 2022 | 74B |
| 1991 | 3.37B | 2007 | 24.8B | 2023 | 85.3B |
| 1992 | 3.79B | 2008 | 35.2B | 2024 | 88.6B |
| 1993 | 4.45B | 2009 | 39.5B | 2025 | 94.2B |
| 1994 | 4.47B | 2010 | 38.4B | 2026 | 104B |
| 1995 | 5.08B | 2011 | 38.7B | | |