答：使用年度账菜单清空年度数据的功能。
Answer: the use of annual account menu empty annual data function.
一个季度是一个较短的时间，而且许多读者习惯阅读年度数据。
A quarter is a short period of time, and many readers are used to seeing changes expressed in percent per year.
这些服务持续盈利了15年，一直到2009年。去年的年度数据也已经发布。
It was profitable for 15 straight years up to 2009, the latest year annual figures are available.
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