Show data table
| 1989 | 14.1% | 2002 | 16.9% | 2015 | 17.9% |
| 1990 | 17.3% | 2003 | 16.9% | 2016 | 18.3% |
| 1991 | 17.8% | 2004 | 16.6% | 2017 | 18.7% |
| 1992 | 18% | 2005 | 17.1% | 2018 | 19.4% |
| 1993 | 18.2% | 2006 | 18.2% | 2019 | 20.2% |
| 1994 | 19.2% | 2007 | 17.9% | 2020 | 20.4% |
| 1995 | 19.1% | 2008 | 17.9% | 2021 | 21% |
| 1996 | 20.2% | 2009 | 16.6% | 2022 | 20.4% |
| 1997 | 20.7% | 2010 | 16.1% | 2023 | 20.3% |
| 1998 | 19% | 2011 | 16.8% | 2024 | 21.2% |
| 1999 | 18.5% | 2012 | 17.5% | 2025 | 20.3% |
| 2000 | 17.5% | 2013 | 17.7% | 2026 | 20.3% |
| 2001 | 17.5% | 2014 | 18.2% | | |
Show data table
| 1989 | 149B | 2002 | 733B | 2015 | 2.5T |
| 1990 | 212B | 2003 | 798B | 2016 | 2.76T |
| 1991 | 253B | 2004 | 882B | 2017 | 3.1T |
| 1992 | 277B | 2005 | 1.01T | 2018 | 3.55T |
| 1993 | 307B | 2006 | 1.19T | 2019 | 3.95T |
| 1994 | 372B | 2007 | 1.29T | 2020 | 3.66T |
| 1995 | 415B | 2008 | 1.44T | 2021 | 4.07T |
| 1996 | 500B | 2009 | 1.4T | 2022 | 4.5T |
| 1997 | 573B | 2010 | 1.51T | 2023 | 4.93T |
| 1998 | 580B | 2011 | 1.71T | 2024 | 5.61T |
| 1999 | 618B | 2012 | 1.93T | 2025 | 5.68T |
| 2000 | 648B | 2013 | 2.13T | 2026 | 6.14T |
| 2001 | 705B | 2014 | 2.4T | | |
Show data table
| 1989 | 15.7% | 2002 | 20.6% | 2015 | 17.8% |
| 1990 | 18.8% | 2003 | 20.4% | 2016 | 19% |
| 1991 | 18% | 2004 | 19.4% | 2017 | 19.5% |
| 1992 | 18.4% | 2005 | 18.7% | 2018 | 20.9% |
| 1993 | 17.6% | 2006 | 18.3% | 2019 | 21.7% |
| 1994 | 19.7% | 2007 | 18.2% | 2020 | 25.9% |
| 1995 | 19.1% | 2008 | 17.9% | 2021 | 27.2% |
| 1996 | 19.6% | 2009 | 19.2% | 2022 | 25.9% |
| 1997 | 20.3% | 2010 | 18.3% | 2023 | 24.7% |
| 1998 | 20.3% | 2011 | 17.2% | 2024 | 25.6% |
| 1999 | 20.7% | 2012 | 17.7% | 2025 | 24.3% |
| 2000 | 20.8% | 2013 | 17.3% | 2026 | 24% |
| 2001 | 21% | 2014 | 16.8% | | |
Show data table
| 1989 | 166B | 2002 | 894B | 2015 | 2.48T |
| 1990 | 231B | 2003 | 963B | 2016 | 2.88T |
| 1991 | 257B | 2004 | 1.03T | 2017 | 3.22T |
| 1992 | 284B | 2005 | 1.11T | 2018 | 3.82T |
| 1993 | 296B | 2006 | 1.2T | 2019 | 4.24T |
| 1994 | 380B | 2007 | 1.31T | 2020 | 4.65T |
| 1995 | 416B | 2008 | 1.44T | 2021 | 5.28T |
| 1996 | 487B | 2009 | 1.61T | 2022 | 5.7T |
| 1997 | 563B | 2010 | 1.72T | 2023 | 6T |
| 1998 | 620B | 2011 | 1.75T | 2024 | 6.78T |
| 1999 | 695B | 2012 | 1.96T | 2025 | 6.8T |
| 2000 | 769B | 2013 | 2.09T | 2026 | 7.25T |
| 2001 | 846B | 2014 | 2.22T | | |