The line graph below shows the number of visitors (in millions) to three major museums in a city — the National Gallery, the Science Museum, and the History Museum — between 2000 and 2020. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The line graph illustrates how many people, measured in millions, visited three major museums in a city — the National Gallery, the Science Museum and the History Museum — over a twenty-year period from 2000 to 2020. Overall, all three museums experienced growth in visitor numbers across the period, although the History Museum saw the most dramatic rise. By 2020, the two most popular attractions had swapped positions compared with the start. In 2000, the National Gallery was the leading museum, welcoming roughly 3 million visitors, followed by the Science Museum at around 2.5 million. The History Museum lagged behind with just 1 million. Over the following decade, the National Gallery grew steadily to about 4 million by 2010, while the Science Museum climbed at a similar pace. The most striking change occurred at the History Museum. Its figures increased sharply after 2010, overtaking the Science Museum around 2014 and eventually reaching approximately 6 million visitors in 2020, making it the busiest of the three. Meanwhile, the National Gallery levelled off after 2010 and finished at around 4.5 million, and the Science Museum ended at just under 5 million. Consequently, the museum that had once been least visited became the clear leader by the end of the period.