Show data table
| 1988 | 17.9% | 2001 | 17.2% | 2014 | 19.3% |
| 1989 | 18% | 2002 | 18% | 2015 | 20.1% |
| 1990 | 17.7% | 2003 | 18.5% | 2016 | 20.4% |
| 1991 | 19.4% | 2004 | 19.2% | 2017 | 20.3% |
| 1992 | 18.8% | 2005 | 19.4% | 2018 | 20.3% |
| 1993 | 17.6% | 2006 | 20.5% | 2019 | 19.6% |
| 1994 | 18.2% | 2007 | 22.4% | 2020 | 18.6% |
| 1995 | 18.2% | 2008 | 20.1% | 2021 | 21% |
| 1996 | 17.7% | 2009 | 18.8% | 2022 | 20.7% |
| 1997 | 17% | 2010 | 19.2% | 2023 | 21.3% |
| 1998 | 16.3% | 2011 | 19.3% | 2024 | 21.4% |
| 1999 | 17.1% | 2012 | 19.9% | 2025 | 21% |
| 2000 | 17.7% | 2013 | 19.7% | 2026 | 21.2% |
Show data table
| 1988 | 768B | 2001 | 3.99T | 2014 | 23.88T |
| 1989 | 888B | 2002 | 4.5T | 2015 | 27.34T |
| 1990 | 1.02T | 2003 | 5.17T | 2016 | 30.96T |
| 1991 | 1.28T | 2004 | 6.13T | 2017 | 34.19T |
| 1992 | 1.43T | 2005 | 7.04T | 2018 | 37.71T |
| 1993 | 1.54T | 2006 | 8.73T | 2019 | 38.5T |
| 1994 | 1.87T | 2007 | 10.95T | 2020 | 36.04T |
| 1995 | 2.19T | 2008 | 11.1T | 2021 | 48.23T |
| 1996 | 2.46T | 2009 | 12T | 2022 | 54.14T |
| 1997 | 2.62T | 2010 | 14.65T | 2023 | 61.82T |
| 1998 | 2.89T | 2011 | 16.85T | 2024 | 68.14T |
| 1999 | 3.41T | 2012 | 19.7T | 2025 | 72.85T |
| 2000 | 3.78T | 2013 | 22.02T | 2026 | 81.63T |
Show data table
| 1988 | 24.5% | 2001 | 28.3% | 2014 | 26.2% |
| 1989 | 25.2% | 2002 | 29.1% | 2015 | 27.3% |
| 1990 | 25.4% | 2003 | 29.9% | 2016 | 27.6% |
| 1991 | 26.8% | 2004 | 28.4% | 2017 | 26.6% |
| 1992 | 26.7% | 2005 | 26% | 2018 | 26.8% |
| 1993 | 26.2% | 2006 | 25.6% | 2019 | 27.4% |
| 1994 | 26.2% | 2007 | 26.1% | 2020 | 31.8% |
| 1995 | 25% | 2008 | 28.3% | 2021 | 30.7% |
| 1996 | 24.4% | 2009 | 28.1% | 2022 | 30% |
| 1997 | 25.2% | 2010 | 27.7% | 2023 | 29.7% |
| 1998 | 26% | 2011 | 27.3% | 2024 | 29.3% |
| 1999 | 25.9% | 2012 | 27.2% | 2025 | 28.5% |
| 2000 | 26.1% | 2013 | 26.5% | 2026 | 28.6% |
Show data table
| 1988 | 1.05T | 2001 | 6.55T | 2014 | 32.41T |
| 1989 | 1.25T | 2002 | 7.26T | 2015 | 37.27T |
| 1990 | 1.46T | 2003 | 8.36T | 2016 | 41.92T |
| 1991 | 1.78T | 2004 | 9.06T | 2017 | 44.83T |
| 1992 | 2.03T | 2005 | 9.45T | 2018 | 49.69T |
| 1993 | 2.29T | 2006 | 10.91T | 2019 | 53.97T |
| 1994 | 2.69T | 2007 | 12.78T | 2020 | 61.59T |
| 1995 | 3.01T | 2008 | 15.59T | 2021 | 70.52T |
| 1996 | 3.4T | 2009 | 17.89T | 2022 | 78.26T |
| 1997 | 3.9T | 2010 | 21.16T | 2023 | 86.09T |
| 1998 | 4.61T | 2011 | 23.87T | 2024 | 93.13T |
| 1999 | 5.14T | 2012 | 26.96T | 2025 | 98.63T |
| 2000 | 5.58T | 2013 | 29.6T | 2026 | 110.13T |