Did a quick search, was only able to get stats for Delta, hizo zingine Yahoo na Bloomberg zimekataa. I'm too tired to do exhaustive searches, so nitangojea 2014 nianze research.
For the last time, recessions ( atleast in America) do not last 10 years, sijui nitakuconvince aje. Believe it or not, the 2007 recession actually ended ( atleast on Wallstreet, coz people made money) and we are now headed back into another recession. If its a Depression, then your theory would hold, but to wait 10 years for a recession to end, utakula vumbi tu. I would say start buying after October, though the market has been uncharacteristically up the past few days. Being that next year is an election year and Republicans are in bed with all the major companies, the stock market will do well going into the election and may continue a run if a person favorable to Wallstreet is elected.