Como dizer "2010-11" em inglês

The findings come from the Household electricity use study, undertaken by the Energy Saving Trust and Department for Environment, Food and Rural Affairs. Under the study, a total of 251 households had their habits examined from 2010-11, with 26 of these watched for a full year and the remainder for about a month.

Dizemos "from twenty ten to twenty eleven" ou "from twenty ten to eleven"?