| 年份 | 单位:% |
| 含“(E)”其对应值为系统预测,仅供参考。 | |
| 2026(E) | 购买后可见 » |
| 2025(E) | 购买后可见 » |
| 2024(E) | 购买后可见 » |
| 2023 | 购买后可见 » |
| 2022 | 购买后可见 » |
| 2021 | 购买后可见 » |
| 2020 | 购买后可见 » |
| 2019 | 购买后可见 » |
| 2018 | 购买后可见 » |
| 2017 | 购买后可见 » |
| 2016 | 购买后可见 » |
| 2015 | 购买后可见 » |
| 2014 | 购买后可见 » |
| 2013 | 9.70 |
| 2012 | 9.40 |
| 2011 | 9.10 |
| 2010 | 8.90 |
| 2009 | 8.50 |
| 2008 | 8.30 |
| 2007 | 8.10 |
| 2006 | 7.90 |
| 2005 | 7.70 |
| 2004 | 7.60 |
| 2003 | 7.50 |
| 2002 | 7.30 |
| 2001 | 7.10 |
| 2000 | 7.00 |
| 1999 | 6.90 |
| 1998 | 6.70 |
| 1997 | 6.50 |
| 1996 | 6.40 |
| 1995 | 6.20 |
| 1990 | 5.60 |
| 1987 | 5.40 |
| 1982 | 4.90 |
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