| 年份 | 1975 | 1980 | 1985 | 1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | | 日元 | 2.7 | 4.4 | 7.3 | 7.2 | 7.7 | 8.3 | 7.3 | 7.3 | 7.5 | 6.2 | 5.5 | 4.8 | 5.1 | | 美元 | 76.1 | 69.0 | 55.3 | 51.3 | 48.8 | 48.3 | 51.9 | 53.0 | 53.0 | 54.0 | 56.9 | 57.1 | 60.3 | | 英镑 | 1.4 | 3.1 | 2.7 | 2.3 | 2.8 | 3.1 | 2.9 | 2.8 | 3.1 | 3.0 | 3.2 | 3.3 | 3.9 | | 德国马克 | 10.8 | 15.6 | 13.9 | 17.8 | 16.5 | 15.1 | 13.0 | 13.4 | 13.8 | 13.2 | 12.5 | 12.3 | 12.1 | | 法国法郎 | 1.2 | 1.8 | 0.8 | 1.4 | 2.2 | 2.7 | 2.4 | 2.1 | 2.3 | 2.2 | 1.7 | 1.3 | 1.3 | | 其他 | 7.8 | 6.1 | 20.0 | 20.0 | 22.0 | 22.5 | 22.5 | 21.4 | 20.3 | 22.3 | 20.2 | 21.2 | 17.3 |
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