参考范文：

The line chart shows the number of overseas visitors who came to the UK for different purposes between 1989 to 2009.

It is notably that people traveling to UK in holiday occupied a dominant place, compared with other two (for business and for visiting friends or relatives), which were over 6 million throughout the time. In detail, Starting at about 7 million in 1989, the visitors to UK then showed an exponential increase to an acme at 9 million in 1997, where it lost its momentum, dipping below a little, before it finally rebound to nearly 10 million in 2009.

Meanwhile, business and friends-visiting trip to UK shared much in common with each other, ascending from 3 million and 5 million to 6 million and 8 million respectively, in this two decades, during which period, year of 1993 and 2003 welcomed the same number of people going for those two purposes.