| 年份 | 单位:‰ |
| 含“(E)”其对应值为系统预测,仅供参考。 | |
| 2027(E) | 购买后可见 » |
| 2026(E) | 购买后可见 » |
| 2025(E) | 购买后可见 » |
| 2024 | 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 | 4.90 |
| 2013 | 4.93 |
| 2012 | 4.88 |
| 2011 | 4.38 |
| 2010 | 4.34 |
| 2009 | 3.48 |
| 2008 | 2.71 |
| 2007 | 3.23 |
| 2006 | 3.13 |
| 2005 | 3.05 |
| 2004 | 2.40 |
| 2003 | 2.32 |
| 2002 | 2.21 |
| 2001 | 2.44 |
| 2000 | 3.70 |
| 1999 | 5.20 |
| 1998 | 5.88 |
| 1997 | 8.12 |
| 1996 | 9.15 |
| 1995 | 9.27 |
| 1994 | 11.49 |
| 1993 | 13.11 |
| 1992 | 12.18 |
| 1991 | 13.34 |
| 1990 | 14.30 |
| 1989 | 14.15 |
| 1988 | 12.64 |
| 1987 | 14.30 |
| 1986 | 13.27 |
| 1985 | 12.33 |
| 1980 | 13.36 |
| 1978 | 11.61 |
| 1975 | 12.86 |
| 1965 | 25.06 |
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