訪問完整數據圖表請先購買:
| 年份 | 單位：‰ |
| 含“(e)”其對應值為系統預測，僅供參考。 | |
| 2028（e） | |
| 2027（e） | |
| 2026（e） | |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | |
| 2017 | |
| 2016 | |
| 2015 | 4.96 |
| 2014 | 5.21 |
| 2013 | 4.92 |
| 2012 | 4.95 |
| 2011 | 4.79 |
| 2010 | 4.79 |
| 2009 | 4.87 |
| 2008 | 5.08 |
| 2007 | 5.17 |
| 2006 | 5.28 |
| 2005 | 5.89 |
| 2004 | 5.87 |
| 2003 | 6.01 |
| 2002 | 6.45 |
| 2001 | 6.95 |
| 2000 | 7.58 |
| 1999 | 8.18 |
| 1998 | 9.14 |
| 1997 | 10.06 |
| 1996 | 10.42 |
| 1995 | 10.55 |
| 1994 | 11.21 |
| 1993 | 11.45 |
| 1992 | 11.60 |
| 1991 | 12.98 |
| 1990 | 14.39 |
| 1989 | 15.04 |
| 1988 | 15.73 |
| 1987 | 16.61 |
| 1986 | 15.57 |
| 1985 | 14.26 |
| 1984 | 13.08 |
| 1983 | 13.29 |
| 1982 | 15.68 |
| 1981 | 14.55 |
| 1980 | 11.87 |
| 1979 | 11.61 |
| 1978 | 12.00 |
| 1977 | 12.06 |
| 1976 | 12.66 |
| 1975 | 15.69 |
| 1974 | 17.48 |
| 1973 | 20.89 |
| 1972 | 22.16 |
| 1971 | 23.33 |
| 1970 | 25.83 |
| 1969 | 26.08 |
| 1968 | 27.38 |
| 1967 | 25.53 |
| 1966 | 26.22 |
| 1965 | 28.38 |
| 1964 | 27.64 |
| 1963 | 33.33 |
| 1962 | 26.99 |
| 1961 | 3.78 |
| 1960 | -4.57 |
| 1959 | 10.19 |
| 1958 | 17.24 |
| 1957 | 23.23 |
| 1956 | 20.50 |
| 1955 | 20.32 |
| 1954 | 24.79 |
| 1953 | 23.00 |
| 1952 | 20.00 |
| 1951 | 20.00 |
| 1950 | 19.00 |
| 1949 | 16.00 |
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