" The average income for the richest 1 percent of Americans, excluding capital gains, rose from $871,100 in 2009 to $968,000 from 2012-13, he wrote. The 99 percent, on the other hand, experienced a drop in average incomes from $44,000 to $43,900, Wolfers said. The calculation excludes government benefits in the form of Social Security, welfare, tax credits, food stamps and so on. "
From http://www.politifact.com/truth-o-meter/statements/2015/apr/...
However, the research in Piketty's book also shows this up through 2010, and I remember the figures he was drafting showing 50% of new income going to the top decile going through 2010 - so Bernie might be a bit aggressive in his numbers, but even 50% of new income going to 10% of the population is just bad. I remember in the book he outlined how only places like Colombia or otherwise Fascist regime countries are worse than the US.
I can dig up the numbers from the book - I read it on ebook so it's always a hassle waiting for the pages to refresh looking for info :/