The chart below shows the numbers of three types of visitors to a museum between 1997 and 2012 Summarize the information by selecting and reporting the main features and make comparisons where relevant

The chart provides three types of visitors to a museum over 15 years starting from 1997. The number of visitors is calculated by thousands of people.

Overall it can be seen that, the majority of visitors to a museum are the adult visitors. The highest number of adult visitors reached 400,500 people. In contrast, the lowest number of three types of visitors are special exhibition visitors with 28,000 people. Compared with two types of visitors, the adult visitors increased and decreased unevenly.

Starting with the adult visitors, the lowest of the chart is 300,100 people in 1997 and gradually increased to 400,500 people in 2007. After that, it decreased to 380,000 people in 2012. In contrast, the highest number of visitors are special exhibition visitors; it started at 28,000 people in 1997 and gradually increased to under 50,000 people in 2012. Meanwhile, the visitors aged under 15 gradually decreased from 120,000 people to 82,300 people over the period 15 years.