| 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 | 4.26 |
| 2012 | 4.06 |
| 2011 | 3.53 |
| 2010 | 3.39 |
| 2009 | 3.77 |
| 2008 | 8.14 |
| 2007 | 8.35 |
| 2006 | 9.28 |
| 2005 | 8.88 |
| 2004 | 8.68 |
| 2003 | 8.50 |
| 2002 | 7.20 |
| 2001 | 7.80 |
| 2000 | 6.23 |
| 1999 | 4.80 |
| 1998 | 3.93 |
| 1997 | 4.06 |
| 1996 | 4.10 |
| 1995 | 5.13 |
| 1994 | 3.63 |
| 1993 | 2.64 |
| 1992 | 3.53 |
| 1991 | 3.66 |
| 1990 | 4.12 |
| 1989 | 4.48 |
| 1988 | 3.97 |
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