You will find information on your data in a box adjacent to your graphs and charts.  This information includes the name of the company that commissioned the data collection, the survey or data gatherer, the name of the data set, and where it has been published.and the date. This information is provided on the Source tab.

Example  of Source tab.

Under Details you can find, amongst other things, information about the region, the survey time period, the number of people surveyed.
 

FAQ: Under FAQ you will also find answers to some frequently asked questions about data access.