Average fees for both barding and day schools rose about 4 percent in the year ending in September 1993, after increases of 8.5 percent the previous year and more than 12 percent in each of the previous two years.

【参考答案】

截止到1993年9月，住宿学校和走读学校的平均费用上升了4%；而在前一年费用增长率为8.5%，前两年费用增长率每年都超过......

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