Show data table
| 1990 | 26.9% | 2003 | 21.7% | 2016 | 25.1% |
| 1991 | 26.8% | 2004 | 23% | 2017 | 23.7% |
| 1992 | 28.7% | 2005 | 25% | 2018 | 23.9% |
| 1993 | 28.2% | 2006 | 24.1% | 2019 | 23.9% |
| 1994 | 26% | 2007 | 24.7% | 2020 | 23.2% |
| 1995 | 21.9% | 2008 | 29.4% | 2021 | 20.1% |
| 1996 | 21.9% | 2009 | 27.1% | 2022 | 19.5% |
| 1997 | 22.1% | 2010 | 25.6% | 2023 | 18.1% |
| 1998 | 20.4% | 2011 | 24.1% | 2024 | 18.6% |
| 1999 | 18.3% | 2012 | 24.4% | 2025 | 18.8% |
| 2000 | 19.2% | 2013 | 26.5% | 2026 | 19.1% |
| 2001 | 17.4% | 2014 | 22.1% | | |
| 2002 | 18.8% | 2015 | 26.4% | | |
Show data table
| 1990 | 30.4B | 2003 | 34B | 2016 | 116B |
| 1991 | 31B | 2004 | 38.3B | 2017 | 116B |
| 1992 | 34.3B | 2005 | 44.3B | 2018 | 124B |
| 1993 | 32.8B | 2006 | 46.3B | 2019 | 131B |
| 1994 | 31.9B | 2007 | 52.3B | 2020 | 130B |
| 1995 | 27.2B | 2008 | 72.3B | 2021 | 121B |
| 1996 | 27B | 2009 | 68.7B | 2022 | 123B |
| 1997 | 27.8B | 2010 | 70.2B | 2023 | 126B |
| 1998 | 26.2B | 2011 | 74.5B | 2024 | 137B |
| 1999 | 24.7B | 2012 | 82.6B | 2025 | 147B |
| 2000 | 26.7B | 2013 | 96.2B | 2026 | 160B |
| 2001 | 25B | 2014 | 87.1B | | |
| 2002 | 28B | 2015 | 114B | | |
Show data table
| 1990 | 30.2% | 2003 | 25.8% | 2016 | 25.9% |
| 1991 | 27.7% | 2004 | 26.7% | 2017 | 23.9% |
| 1992 | 34.9% | 2005 | 26.2% | 2018 | 25.9% |
| 1993 | 35.3% | 2006 | 23.9% | 2019 | 24.9% |
| 1994 | 30.9% | 2007 | 26.6% | 2020 | 25.8% |
| 1995 | 27% | 2008 | 28.8% | 2021 | 23.1% |
| 1996 | 23.7% | 2009 | 31% | 2022 | 21% |
| 1997 | 25% | 2010 | 26.6% | 2023 | 21.6% |
| 1998 | 24% | 2011 | 25.3% | 2024 | 21.3% |
| 1999 | 23.5% | 2012 | 26.5% | 2025 | 19.5% |
| 2000 | 23.2% | 2013 | 26.8% | 2026 | 19.5% |
| 2001 | 21% | 2014 | 29% | | |
| 2002 | 23.4% | 2015 | 42% | | |
Show data table
| 1990 | 34.1B | 2003 | 40.5B | 2016 | 120B |
| 1991 | 32B | 2004 | 44.4B | 2017 | 117B |
| 1992 | 41.6B | 2005 | 46.4B | 2018 | 134B |
| 1993 | 41.1B | 2006 | 45.8B | 2019 | 137B |
| 1994 | 38B | 2007 | 56.2B | 2020 | 144B |
| 1995 | 33.5B | 2008 | 70.8B | 2021 | 139B |
| 1996 | 29.2B | 2009 | 78.6B | 2022 | 133B |
| 1997 | 31.4B | 2010 | 73.1B | 2023 | 150B |
| 1998 | 30.8B | 2011 | 78.2B | 2024 | 157B |
| 1999 | 31.7B | 2012 | 89.5B | 2025 | 152B |
| 2000 | 32.2B | 2013 | 97.4B | 2026 | 164B |
| 2001 | 30.2B | 2014 | 114B | | |
| 2002 | 34.8B | 2015 | 181B | | |