Show data table
| 1981 | 46.4% | 1997 | 35.9% | 2013 | 28% |
| 1982 | 35% | 1998 | 32.4% | 2014 | 31.3% |
| 1983 | 41.2% | 1999 | 38.9% | 2015 | 27.1% |
| 1984 | 41.4% | 2000 | 39.6% | 2016 | 28.1% |
| 1985 | 45.1% | 2001 | 38.1% | 2017 | 26.1% |
| 1986 | 45.3% | 2002 | 35% | 2018 | 30.2% |
| 1987 | 46.9% | 2003 | 24.5% | 2019 | 22.8% |
| 1988 | 46.7% | 2004 | 32.8% | 2020 | 29.1% |
| 1989 | 36.7% | 2005 | 29.5% | 2021 | 30.9% |
| 1990 | 28.6% | 2006 | 33.4% | 2022 | 25.1% |
| 1991 | 30.3% | 2007 | 34% | 2023 | 24.1% |
| 1992 | 31% | 2008 | 33.5% | 2024 | 26.5% |
| 1993 | 39.9% | 2009 | 38.5% | 2025 | 27.8% |
| 1994 | 37.7% | 2010 | 43.5% | 2026 | 32.1% |
| 1995 | 37.7% | 2011 | 33.1% | | |
| 1996 | 40.4% | 2012 | 33% | | |
Show data table
| 1981 | 575M | 1997 | 4.66B | 2013 | 30.7B |
| 1982 | 498M | 1998 | 4.95B | 2014 | 37.8B |
| 1983 | 676M | 1999 | 6.92B | 2015 | 36.2B |
| 1984 | 790M | 2000 | 7.86B | 2016 | 42B |
| 1985 | 970M | 2001 | 8.38B | 2017 | 42.7B |
| 1986 | 1.12B | 2002 | 8.85B | 2018 | 52.1B |
| 1987 | 1.45B | 2003 | 7.05B | 2019 | 42B |
| 1988 | 1.77B | 2004 | 10.4B | 2020 | 54.6B |
| 1989 | 1.62B | 2005 | 10.5B | 2021 | 59.7B |
| 1990 | 1.47B | 2006 | 13.5B | 2022 | 54.4B |
| 1991 | 1.75B | 2007 | 16.1B | 2023 | 57.5B |
| 1992 | 1.99B | 2008 | 18.3B | 2024 | 70.2B |
| 1993 | 2.88B | 2009 | 23.4B | 2025 | 81.5B |
| 1994 | 3.12B | 2010 | 31B | 2026 | 105B |
| 1995 | 3.65B | 2011 | 28.2B | | |
| 1996 | 4.49B | 2012 | 32.6B | | |
Show data table
| 1981 | 50% | 1997 | 37.8% | 2013 | 32.5% |
| 1982 | 33.9% | 1998 | 31.1% | 2014 | 28.9% |
| 1983 | 42.2% | 1999 | 40.2% | 2015 | 27.5% |
| 1984 | 39.3% | 2000 | 43% | 2016 | 30.5% |
| 1985 | 54.1% | 2001 | 50.3% | 2017 | 30.6% |
| 1986 | 48.7% | 2002 | 39.3% | 2018 | 31.7% |
| 1987 | 47.5% | 2003 | 34.7% | 2019 | 24.2% |
| 1988 | 45.3% | 2004 | 31% | 2020 | 30.9% |
| 1989 | 46.8% | 2005 | 36.4% | 2021 | 36.6% |
| 1990 | 35.8% | 2006 | 33.4% | 2022 | 32.1% |
| 1991 | 30.8% | 2007 | 33.2% | 2023 | 28.9% |
| 1992 | 34.5% | 2008 | 36.1% | 2024 | 28.3% |
| 1993 | 35.2% | 2009 | 39.3% | 2025 | 30.5% |
| 1994 | 37.9% | 2010 | 41.5% | 2026 | 35% |
| 1995 | 38.6% | 2011 | 36.1% | | |
| 1996 | 37.9% | 2012 | 35.1% | | |
Show data table
| 1981 | 618M | 1997 | 4.91B | 2013 | 35.6B |
| 1982 | 483M | 1998 | 4.75B | 2014 | 34.9B |
| 1983 | 692M | 1999 | 7.15B | 2015 | 36.9B |
| 1984 | 750M | 2000 | 8.53B | 2016 | 45.5B |
| 1985 | 1.17B | 2001 | 11.1B | 2017 | 50B |
| 1986 | 1.21B | 2002 | 9.94B | 2018 | 54.7B |
| 1987 | 1.46B | 2003 | 9.99B | 2019 | 44.8B |
| 1988 | 1.72B | 2004 | 9.87B | 2020 | 58B |
| 1989 | 2.07B | 2005 | 13B | 2021 | 70.8B |
| 1990 | 1.84B | 2006 | 13.5B | 2022 | 69.4B |
| 1991 | 1.78B | 2007 | 15.7B | 2023 | 68.8B |
| 1992 | 2.22B | 2008 | 19.7B | 2024 | 74.9B |
| 1993 | 2.54B | 2009 | 23.9B | 2025 | 89.4B |
| 1994 | 3.13B | 2010 | 29.6B | 2026 | 114B |
| 1995 | 3.74B | 2011 | 30.7B | | |
| 1996 | 4.21B | 2012 | 34.7B | | |