| 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 | 7.67 |
| 2012 | 6.99 |
| 2011 | 6.47 |
| 2010 | 6.36 |
| 2009 | 6.23 |
| 2008 | 5.31 |
| 2007 | 5.11 |
| 2006 | 6.38 |
| 2005 | 7.26 |
| 2004 | 7.26 |
| 2003 | 7.49 |
| 2002 | 7.22 |
| 2001 | 7.77 |
| 2000 | 7.99 |
| 1999 | 7.87 |
| 1998 | 6.96 |
| 1997 | 7.01 |
| 1996 | 7.60 |
| 1995 | 7.27 |
| 1994 | 8.40 |
| 1993 | 8.31 |
| 1992 | 7.45 |
| 1991 | 7.81 |
| 1990 | 6.72 |
| 1989 | 6.91 |
| 1988 | 6.80 |
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