| 年份 | 单位：% |
| 含“(E)”其对应值为系统预测，仅供参考。 | |
| 2030（E） | 购买后可见 » |
| 2029（E） | 购买后可见 » |
| 2028（E） | 购买后可见 » |
| 2027 | 购买后可见 » |
| 2026 | 购买后可见 » |
| 2025 | 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 | 88.85 |
| 2016 | 91.76 |
| 2015 | 91.22 |
| 2014 | 85.60 |
| 2013 | 86.15 |
| 2012 | 85.41 |
| 2011 | 81.78 |
| 2010 | 81.22 |
| 2009 | 79.27 |
| 2008 | 67.89 |
| 2007 | 66.86 |
| 2006 | 69.92 |
| 2005 | 70.47 |
| 2004 | 72.36 |
| 2003 | 76.56 |
| 2002 | 80.55 |
| 2001 | 82.66 |
| 2000 | 82.13 |
| 1999 | 91.37 |
| 1998 | 95.17 |
| 1997 | 96.32 |
| 1996 | 101.72 |
| 1995 | 101.60 |
| 1994 | 97.96 |
| 1993 | 96.32 |
| 1992 | 90.23 |
| 1991 | 82.34 |
| 1990 | 75.19 |
| 1989 | 72.25 |
| 1988 | 71.08 |
| 1987 | 71.45 |
| 1986 | 71.00 |
| 1985 | 66.87 |
| 1984 | 61.67 |
| 1983 | 58.40 |
| 1982 | 52.67 |
| 1981 | 46.93 |
| 1980 | 45.63 |
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