The chart below shows the numbers of three types of visitors to a museum between 1997 and 2012.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
The bar chart illustrates how many people visited a museum, divided into three categories (adults, visitors under 15, and special exhibition attendees), over the 15-year period from 1997 to 2012. Overall, the total number of museum visitors peaked in 2007, despite a slight dip in the first five years. Adults consistently made up the largest group of visitors throughout the period, while the number of children visiting fell steadily, and attendance at special exhibitions rose gradually. In detail, adult visitor numbers remained stable at around 300,000 in 1997 and 2002, before surging to a peak of 400,500 in 2007, followed by a slight drop to 380,000 in 2012. By contrast, the figure for visitors aged under 15 declined continuously, from 120,000 in 1997 to just 82,300 by the end of the period. Special exhibition attendance saw a steady increase, rising from 28,000 in 1997 to 42,000 in 2012. In terms of total visits, numbers stayed at roughly 440,000 to 448,000 in the first two recorded years, jumped to a high of 525,200 in 2007, and then fell slightly to 504,300 in 2012.
shows替换为illustrates,three types of visitors补充三类访客的具体分类,明确时间范围,完成题目介绍。