| 年份 | 單位:% |
| 含“(E)”其對應值為系統預測,僅供參考。 | |
| 2027(E) | 購買后可見 ? |
| 2026(E) | 購買后可見 ? |
| 2025(E) | 購買后可見 ? |
| 2024 | 購買后可見 ? |
| 2023 | 購買后可見 ? |
| 2022 | 購買后可見 ? |
| 2021 | 購買后可見 ? |
| 2020 | 購買后可見 ? |
| 2019 | 購買后可見 ? |
| 2018 | 購買后可見 ? |
| 2017 | 購買后可見 ? |
| 2016 | 購買后可見 ? |
| 2015 | 購買后可見 ? |
| 2014 | 4.51 |
| 2013 | 4.21 |
| 2012 | 5.04 |
| 2011 | 4.08 |
| 2010 | 3.57 |
| 2009 | 4.00 |
| 2008 | 5.24 |
| 2007 | 2.68 |
| 2006 | 4.35 |
| 2005 | 5.22 |
| 2004 | 7.35 |
| 2003 | 3.09 |
| 2002 | 4.11 |
| 2001 | 4.64 |
| 2000 | 4.14 |
| 1999 | 5.64 |
| 1998 | 7.22 |
| 1997 | 6.48 |
| 1996 | 9.26 |
| 1995 | 8.70 |
| 1994 | 6.35 |
| 1993 | 7.64 |
| 1992 | 8.14 |
| 1991 | 6.75 |
| 1990 | 40.25 |
| 1989 | 15.91 |
| 1988 | 5.35 |
| 1987 | 10.16 |
| 1986 | 9.84 |
| 1985 | 4.06 |
| 1984 | 25.58 |
| 1983 | 23.85 |
| 1982 | 38.56 |
| 1981 | 40.47 |
| 1980 | -4.82 |
| 1979 | 20.87 |
| 1978 | 9.83 |
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