Donations from New York, Washington DC, Massachusetts, California and Texas make up 2 out of every 3 dollars raised by the Super PACs.
In congressional races in 2010, the candidate who spent the most won 85% of the House races and 83% of the Senate races, according to the Center for Responsive Politics
http://endoftheamericandream.com/archives/buying-the-vote-12-facts-about-super-pacs-that-will-blow-your-mind
As of March 20 2016:
102,479 Bernie Sanders ads aired
92,610 Hillary Clinton ads aired
59,195 Marco Rubio ads aired
41,767 Ted Cruz ads aired
39,062 Jeb Bush ads aired
28,305 Donald Trump ads aired
14,541 John Kasich ads aired
https://www.publicintegrity.org/2015/10/16/18631/see-how-much-2016-presidential-candidates-have-raised-so-far
In the 1st 12 days of 2016, a super PAC backing Jeb Bush spent $13.5 million in Iowa, New Hampshire and other states on ads and direct mail promoting the former Florida governor and attacking his rivals.
http://www.wsj.com/articles/super-pacs-are-spending-so-far-to-little-effect-1452891580
