I want to know the answer to the following question:
How many series have aired since 2011?
All the background I'm provided with is that "In Japan, Digital Monster X-Evolution, the eighth TV movie, was released on January 3, 2005, and on December 23, 2005 at Jump Festa 2006, the fifth series, Digimon Savers was announced for Japan to begin airing after a three-year hiatus of the show.". Is that enough to answer the question?