In 2010, Yum Brands Inc. reported a profit margin of 10.4% using profit in the numerator. Had the profit margin been based on total comprehensive income, instead of profit, the revised profit margin would have remained unchanged at 10.4%. In 2009, its profit margin was 10.0% using profit and 11.7% using total comprehensive income. Has Yum Brands' profitability improved or deteriorated in 2010?