作文地带提示：以下是某英文报联合你校对你市（Kangming City）1998年到2008年家庭消费变化的图表，请据此写一篇短文，作一文字说明。文章的开头已经给出。词数110左右。

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The average family income in our Kangming City increased from 8,000 yuan per year in 1998 to 20,000 yuan in 2008. In the meantime, the structure of the average family expenses has changed, too. These graphs show the change clearly.

The biggest part of the average family expenses is housing. In 1998, the average family spent 25 percent of its income on housing. In 2880, expenses on housing rose to 42 percent. Food and drink are the second biggest part of the average family expenses. In 1998, about 18% of the average income was spent on this item. In 2008, the figure grew to 30%. As a result of such increase in the expenses on housing and food, expenses on other items have been reduced from 57% in 1998 to 28%in 2008.

Thus, a conclusion can be drawn that as income increases, people can improve their living step. But still the average family has to spend a large part of income to meet the basic needs.