Under Number of museums in the left hand menu:
Use the left hand menu to view the bar charts and graphs according to the categories of governance, location, size, and subject matter. Where relevant, you can also use the date slider beneath the chart to change the year in view.
Under Table in the left hand menu:
Use this heat map to generate numbers of museums in two categories: for example, to see numbers of museums according to size and subject matter.
Select a category for X and a different category for Y from the menu. Set the year by using the slider beneath the chart.