Show data table
| 1984 | 17.6% | 1999 | 11% | 2014 | 14.2% |
| 1985 | 19.7% | 2000 | 8.6% | 2015 | 21.7% |
| 1986 | 20.7% | 2001 | 10.9% | 2016 | 13.4% |
| 1987 | 19.3% | 2002 | 12.1% | 2017 | 18.8% |
| 1988 | 17.5% | 2003 | 10.7% | 2018 | 17.8% |
| 1989 | 18.4% | 2004 | 10.7% | 2019 | 15.8% |
| 1990 | 19.2% | 2005 | 11.4% | 2020 | 18.3% |
| 1991 | 17.7% | 2006 | 10.9% | 2021 | 17.1% |
| 1992 | 18.4% | 2007 | 11.9% | 2022 | 14.5% |
| 1993 | 17.5% | 2008 | 13.7% | 2023 | 16.5% |
| 1994 | 18.1% | 2009 | 14% | 2024 | 16.5% |
| 1995 | 14.2% | 2010 | 17.5% | 2025 | 17.2% |
| 1996 | 12.1% | 2011 | 14.1% | 2026 | 17.6% |
| 1997 | 13.2% | 2012 | 16.8% | | |
| 1998 | 11.1% | 2013 | 25.3% | | |
Show data table
| 1984 | 14.5B | 1999 | 18.9B | 2014 | 60.5B |
| 1985 | 17B | 2000 | 15.6B | 2015 | 92.8B |
| 1986 | 18.5B | 2001 | 22.2B | 2016 | 60.3B |
| 1987 | 18.2B | 2002 | 26.9B | 2017 | 88B |
| 1988 | 17.5B | 2003 | 25.5B | 2018 | 87.5B |
| 1989 | 19.2B | 2004 | 26.4B | 2019 | 82.7B |
| 1990 | 21B | 2005 | 29.5B | 2020 | 95.8B |
| 1991 | 20B | 2006 | 29.5B | 2021 | 90.7B |
| 1992 | 21.2B | 2007 | 33.9B | 2022 | 82.8B |
| 1993 | 21.3B | 2008 | 41.9B | 2023 | 99.8B |
| 1994 | 23.7B | 2009 | 44.8B | 2024 | 108B |
| 1995 | 21B | 2010 | 58.9B | 2025 | 121B |
| 1996 | 18.2B | 2011 | 50.9B | 2026 | 134B |
| 1997 | 21B | 2012 | 65.4B | | |
| 1998 | 17.8B | 2013 | 105B | | |
Show data table
| 1984 | 23.3% | 1999 | 11.5% | 2014 | 14.5% |
| 1985 | 24.8% | 2000 | 9.7% | 2015 | 19.1% |
| 1986 | 25.6% | 2001 | 13% | 2016 | 18.9% |
| 1987 | 22.4% | 2002 | 14.3% | 2017 | 18.8% |
| 1988 | 20.2% | 2003 | 12.8% | 2018 | 19.2% |
| 1989 | 19.7% | 2004 | 11.7% | 2019 | 20.1% |
| 1990 | 20.3% | 2005 | 12.8% | 2020 | 18.8% |
| 1991 | 19.9% | 2006 | 12.5% | 2021 | 20% |
| 1992 | 20.4% | 2007 | 13.1% | 2022 | 18.4% |
| 1993 | 16.3% | 2008 | 15.1% | 2023 | 17.9% |
| 1994 | 21.8% | 2009 | 13.7% | 2024 | 19.1% |
| 1995 | 18.4% | 2010 | 13.3% | 2025 | 19.5% |
| 1996 | 15.5% | 2011 | 13.2% | 2026 | 18.8% |
| 1997 | 14.5% | 2012 | 14.9% | | |
| 1998 | 13.1% | 2013 | 14.8% | | |
Show data table
| 1984 | 19.3B | 1999 | 19.7B | 2014 | 61.8B |
| 1985 | 21.4B | 2000 | 17.6B | 2015 | 81.6B |
| 1986 | 22.9B | 2001 | 26.6B | 2016 | 85.1B |
| 1987 | 21.1B | 2002 | 31.7B | 2017 | 88.4B |
| 1988 | 20.2B | 2003 | 30.3B | 2018 | 94.1B |
| 1989 | 20.6B | 2004 | 28.8B | 2019 | 105B |
| 1990 | 22.1B | 2005 | 33.2B | 2020 | 98.5B |
| 1991 | 22.5B | 2006 | 33.6B | 2021 | 106B |
| 1992 | 23.5B | 2007 | 37.3B | 2022 | 105B |
| 1993 | 19.7B | 2008 | 46.3B | 2023 | 108B |
| 1994 | 28.5B | 2009 | 43.6B | 2024 | 125B |
| 1995 | 27B | 2010 | 44.7B | 2025 | 137B |
| 1996 | 23.4B | 2011 | 47.8B | 2026 | 142B |
| 1997 | 23.1B | 2012 | 57.8B | | |
| 1998 | 21B | 2013 | 61.3B | | |