Please answer a question about the following article about Arena Football League:

It was announced on December 12, 2012, that the AFL reached a partnership agreement with NET10 Wireless to be the first non-motorsports-related professional sports league in the United States to have a title sponsor, renaming it the NET10 Wireless Arena Football League. The redesigned website showed the new logo which incorporated the current AFL logo with the one from NET10 Wireless. The title sponsorship agreement ended in 2014 after a two-year partnership.

When did the AFL title sponsorship deal come to an end?
2014