Show data table
| 1987 | 17.3% | 2001 | 13.3% | 2015 | 12.2% |
| 1988 | 17.7% | 2002 | 15.5% | 2016 | 12.3% |
| 1989 | 16.4% | 2003 | 9.2% | 2017 | 12.1% |
| 1990 | 15.4% | 2004 | 11.3% | 2018 | 15.9% |
| 1991 | 14.6% | 2005 | 11.8% | 2019 | 17.1% |
| 1992 | 15.8% | 2006 | 22% | 2020 | 20.7% |
| 1993 | 15% | 2007 | 13.9% | 2021 | 13.3% |
| 1994 | 14.8% | 2008 | 14.8% | 2022 | 12% |
| 1995 | 15.7% | 2009 | 15.5% | 2023 | 14% |
| 1996 | 10.7% | 2010 | 15.9% | 2024 | 14.3% |
| 1997 | 12.9% | 2011 | 12% | 2025 | 15.6% |
| 1998 | 18.1% | 2012 | 14% | 2026 | 14.3% |
| 1999 | 17.7% | 2013 | 11.1% | | |
| 2000 | 15.2% | 2014 | 13.6% | | |
Show data table
| 1987 | 62.6B | 2001 | 87.5B | 2015 | 134B |
| 1988 | 67.3B | 2002 | 106B | 2016 | 145B |
| 1989 | 65.9B | 2003 | 63.8B | 2017 | 154B |
| 1990 | 62.4B | 2004 | 78.5B | 2018 | 211B |
| 1991 | 58B | 2005 | 88B | 2019 | 245B |
| 1992 | 59.6B | 2006 | 176B | 2020 | 298B |
| 1993 | 54.8B | 2007 | 117B | 2021 | 200B |
| 1994 | 70B | 2008 | 135B | 2022 | 191B |
| 1995 | 88.1B | 2009 | 150B | 2023 | 232B |
| 1996 | 55B | 2010 | 169B | 2024 | 249B |
| 1997 | 73B | 2011 | 138B | 2025 | 289B |
| 1998 | 109B | 2012 | 179B | 2026 | 278B |
| 1999 | 113B | 2013 | 92.7B | | |
| 2000 | 93.4B | 2014 | 138B | | |
Show data table
| 1987 | 21.9% | 2001 | 14.1% | 2015 | 12.7% |
| 1988 | 21.4% | 2002 | 16.7% | 2016 | 11.1% |
| 1989 | 19.6% | 2003 | 12.3% | 2017 | 13.1% |
| 1990 | 22% | 2004 | 13.1% | 2018 | 16.8% |
| 1991 | 22.6% | 2005 | 16.2% | 2019 | 15.8% |
| 1992 | 23.1% | 2006 | 13.4% | 2020 | 24% |
| 1993 | 20.6% | 2007 | 12.9% | 2021 | 19% |
| 1994 | 22.4% | 2008 | 16% | 2022 | 17.1% |
| 1995 | 20.6% | 2009 | 16% | 2023 | 17.5% |
| 1996 | 11.7% | 2010 | 17.3% | 2024 | 19.4% |
| 1997 | 14.5% | 2011 | 14.2% | 2025 | 21.1% |
| 1998 | 18.1% | 2012 | 14.7% | 2026 | 19.3% |
| 1999 | 18.2% | 2013 | 13.4% | | |
| 2000 | 17.2% | 2014 | 16.7% | | |
Show data table
| 1987 | 79.5B | 2001 | 93.2B | 2015 | 140B |
| 1988 | 81.5B | 2002 | 114B | 2016 | 131B |
| 1989 | 79B | 2003 | 84.9B | 2017 | 167B |
| 1990 | 89.1B | 2004 | 90.5B | 2018 | 223B |
| 1991 | 89.7B | 2005 | 121B | 2019 | 226B |
| 1992 | 87.3B | 2006 | 107B | 2020 | 345B |
| 1993 | 75.5B | 2007 | 108B | 2021 | 285B |
| 1994 | 106B | 2008 | 146B | 2022 | 273B |
| 1995 | 115B | 2009 | 156B | 2023 | 288B |
| 1996 | 60.5B | 2010 | 183B | 2024 | 336B |
| 1997 | 81.9B | 2011 | 163B | 2025 | 391B |
| 1998 | 109B | 2012 | 189B | 2026 | 375B |
| 1999 | 116B | 2013 | 112B | | |
| 2000 | 106B | 2014 | 169B | | |