데이터 표
| 1997 | 64.2% | 2007 | 3.1% | 2017 | 24.7% |
| 1998 | 81.6% | 2008 | 3.6% | 2018 | 22.5% |
| 1999 | 66.7% | 2009 | 3.1% | 2019 | 17.7% |
| 2000 | 55.1% | 2010 | 7% | 2020 | 15.4% |
| 2001 | 34.1% | 2011 | 14.8% | 2021 | 12.3% |
| 2002 | 24.2% | 2012 | 17.9% | 2022 | 7.1% |
| 2003 | 16.9% | 2013 | 20.4% | 2023 | 5.5% |
| 2004 | 11.4% | 2014 | 16% | 2024 | 4.1% |
| 2005 | 6.8% | 2015 | 19% | 2025 | 3.8% |
| 2006 | 4.2% | 2016 | 21.1% | 2026 | 3.7% |
데이터 표
| 1997 | 13.3억 | 2007 | 7.7억 | 2017 | 328억 |
| 1998 | 21.3억 | 2008 | 16.4억 | 2018 | 321억 |
| 1999 | 24.9억 | 2009 | 16.6억 | 2019 | 279억 |
| 2000 | 26.8억 | 2010 | 42.8억 | 2020 | 244억 |
| 2001 | 22.9억 | 2011 | 117억 | 2021 | 213억 |
| 2002 | 20.4억 | 2012 | 180억 | 2022 | 142억 |
| 2003 | 18.7억 | 2013 | 227억 | 2023 | 120억 |
| 2004 | 15.7억 | 2014 | 198억 | 2024 | 98.8억 |
| 2005 | 11.3억 | 2015 | 237억 | 2025 | 102억 |
| 2006 | 8.76억 | 2016 | 267억 | 2026 | 107억 |