50,000 flights cancelled in January 2014 in U.S.

I'm looking at a graph of U.S. domestic flight cancellations paused on my TIVO DVR from CNN's Situation Room with Wolf Blitzer.

This is the most flights cancelled in years for the U.S. and caused almost completely by the Polar vortex of Polar weather moving south as far as Texas and Florida.

Here are the basic figures

2014: Almost 50,000 cancellations in January
2013: only about 10,000 cancellations in January
2012: only about 9,000 cancellations in January
2011: almost 30,000 cancellations in January
2010: about 12,000 cancellations in January
2009: about 15,000 cancellations in January

Note: because of the way the graph is designed with only 10,000 flight demarcations I could be plus or minus about 2,000 flights on any one year. So, I'm just estimating from what it looks like comparatively from this 10,000 only variation graph. So, it says 10,000   20,000   30,000  40,000 and 50,000 as graph demarcations.