| 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 | 11.86 |
| 2013 | 11.08 |
| 2012 | 11.00 |
| 2011 | 10.39 |
| 2010 | 10.36 |
| 2009 | 9.48 |
| 2008 | 9.21 |
| 2007 | 9.19 |
| 2006 | 9.08 |
| 2005 | 8.74 |
| 2004 | 8.43 |
| 2003 | 8.26 |
| 2002 | 8.38 |
| 2001 | 8.51 |
| 2000 | 9.71 |
| 1999 | 11.57 |
| 1998 | 12.58 |
| 1997 | 14.81 |
| 1996 | 16.08 |
| 1995 | 16.18 |
| 1994 | 18.17 |
| 1993 | 20.04 |
| 1992 | 19.05 |
| 1991 | 20.70 |
| 1990 | 21.60 |
| 1989 | 21.09 |
| 1988 | 19.08 |
| 1987 | 21.43 |
| 1986 | 21.01 |
| 1985 | 19.95 |
| 1980 | 20.36 |
| 1978 | 18.67 |
| 1975 | 20.74 |
| 1965 | 35.10 |
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