| 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 | 49.91 |
| 2013 | 47.25 |
| 2012 | 45.00 |
| 2011 | 43.89 |
| 2010 | 39.02 |
| 2009 | 43.71 |
| 2008 | 46.16 |
| 2007 | 47.27 |
| 2006 | 45.93 |
| 2005 | 44.26 |
| 2004 | 40.84 |
| 2003 | 38.96 |
| 2002 | 46.49 |
| 2001 | 48.97 |
| 2000 | 36.24 |
| 1999 | 37.44 |
| 1998 | 33.04 |
| 1997 | 34.47 |
| 1996 | 28.53 |
| 1995 | 28.50 |
| 1994 | 27.40 |
| 1993 | 27.97 |
| 1992 | 28.67 |
| 1991 | 32.18 |
| 1990 | 19.99 |
| 1989 | 40.14 |
| 1988 | 33.36 |
| 1987 | 34.85 |
| 1986 | 36.94 |
| 1985 | 34.76 |
| 1984 | 31.73 |
| 1983 | 32.65 |
| 1982 | 32.64 |
| 1981 | 41.83 |
| 1980 | 19.19 |
| 1979 | 25.57 |
| 1978 | 28.35 |
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