During 2010/11, 39% of adults in England said that they had volunteered formally at least once in the previous 12 months, with 25% volunteering formally at least once a month.^[68a]

This equates to 16.6 million people in England volunteering formally at least once a year and 10.6 million people in England volunteering formally once a month. If the survey results were equally valid for the UK adult population as a whole, these estimates would increase to 19.8 million (once a year), and 12.7 million (once a month).