Show data table
| 1997 | 18.4% | 2007 | 26.1% | 2017 | 27.8% |
| 1998 | 26.8% | 2008 | 26.8% | 2018 | 27.1% |
| 1999 | 28.3% | 2009 | 26.1% | 2019 | 26.9% |
| 2000 | 26.1% | 2010 | 25.9% | 2020 | 25.7% |
| 2001 | 25.8% | 2011 | 25.4% | 2021 | 27.4% |
| 2002 | 25.3% | 2012 | 24.8% | 2022 | 26.6% |
| 2003 | 24.7% | 2013 | 24% | 2023 | 27.2% |
| 2004 | 25% | 2014 | 26.3% | 2024 | 28.2% |
| 2005 | 25.4% | 2015 | 26.4% | 2025 | 28.3% |
| 2006 | 25.9% | 2016 | 27.6% | 2026 | 29% |
Show data table
| 1997 | 61B | 2007 | 252B | 2017 | 430B |
| 1998 | 103B | 2008 | 290B | 2018 | 450B |
| 1999 | 125B | 2009 | 298B | 2019 | 460B |
| 2000 | 131B | 2010 | 321B | 2020 | 426B |
| 2001 | 146B | 2011 | 330B | 2021 | 511B |
| 2002 | 155B | 2012 | 330B | 2022 | 573B |
| 2003 | 167B | 2013 | 324B | 2023 | 644B |
| 2004 | 184B | 2014 | 367B | 2024 | 710B |
| 2005 | 205B | 2015 | 379B | 2025 | 755B |
| 2006 | 226B | 2016 | 407B | 2026 | 821B |
Show data table
| 1997 | 30.3% | 2007 | 29.3% | 2017 | 29.2% |
| 1998 | 36.8% | 2008 | 31.7% | 2018 | 28.7% |
| 1999 | 37.1% | 2009 | 32.7% | 2019 | 28.7% |
| 2000 | 33.8% | 2010 | 29.4% | 2020 | 32.4% |
| 2001 | 32.7% | 2011 | 28.9% | 2021 | 31.9% |
| 2002 | 31.5% | 2012 | 28.2% | 2022 | 30.3% |
| 2003 | 29.7% | 2013 | 29.2% | 2023 | 28.5% |
| 2004 | 30.2% | 2014 | 31.7% | 2024 | 28.9% |
| 2005 | 28.9% | 2015 | 30.8% | 2025 | 30.1% |
| 2006 | 29.2% | 2016 | 29.1% | 2026 | 31% |
Show data table
| 1997 | 100B | 2007 | 283B | 2017 | 452B |
| 1998 | 141B | 2008 | 343B | 2018 | 476B |
| 1999 | 165B | 2009 | 374B | 2019 | 492B |
| 2000 | 170B | 2010 | 364B | 2020 | 536B |
| 2001 | 184B | 2011 | 376B | 2021 | 596B |
| 2002 | 193B | 2012 | 376B | 2022 | 651B |
| 2003 | 201B | 2013 | 394B | 2023 | 675B |
| 2004 | 222B | 2014 | 443B | 2024 | 729B |
| 2005 | 232B | 2015 | 441B | 2025 | 801B |
| 2006 | 255B | 2016 | 429B | 2026 | 878B |