Sure, AIG turned in the worst underwriting results among the nation’s big insurers — paying out nearly 30% more on claims and expenses than it received in premiums. Still, AIG swung to a tidy profit last year after a disastrous 2009.For that bit of financial wizardry, credit outspoken CEO Robert Benmosche, who’s defying all odds turning around the beleaguered insurance giant. The company has repaid billions to the government — including its entire obligation to the Fed — and regained access to credit and debt markets. A recent move: unloading two insurance units for $37 billion. —P.N.