What per cent of people in the UK have used the Internet?
Picking a year updates the doughnut chart with that year's data.
##Source London Datastore (london.gov.uk): Internet Use by Borough, and Population Sub-Groups. There is additional context in this recent update from the ONS.
See also D3.JS creator Mike Bostock's Pie Chart for a canonical example of how to achieve a pie chart that updates. The colours I chose are from the Flat UI site.
Jan 10: I have added the fastclick polyfill from Financial Times Labs.
Modified http://d3js.org/d3.v3.min.js to a secure url
https://d3js.org/d3.v3.min.js