This is the Health and Provision of Unpaid Care data (KS301) from the 2011 Census. The data provides the reported health of all usual residents and the provision of care they give to people.
The questions were:
How is your health in general?
Are your day-to-day activities limited because of a health problem or disability which has lasted, or is expected to last, at least 12 months? (include problems related to old age)
Yes, limited a lot
Yes, limited a little
Do you look after, or give any help or support to family members, friends, neighbours or others because of either: long-term physical or mental ill-health / disability? problems related to old age? Do not count anything you do as part of your paid employment
Yes, 1 - 19 hours a week
Yes, 20 - 49 hours a week
Yes, 50 or more hours a week
The 2011 census in England and Wales took place on 27th March 2011. It provides a snapshot of the population and its characteristics on that day.
Further information about the census estimates, including details about the methodology is available here: http://www.ons.gov.uk/ons/guide-method/census/2011/index.html