The chart below gives details of students' enrolment in sports activities in a public school. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The bar chart indicates the number of boys and girls enrolled in sports activities in a public school, over 3 time periods approximately 20 years apart, i.e. the years 1960-61, 1980-1981, and 2000-2001. The data is measured in units of tens. In the period from 1960-61, less than 30 girls and more than 50 boys […]