2014 2015 Real GDP growth (annual percent) 3.6 3.9 Inflation (annual percent) 5.2 5.6 Interest rate (nominal, annual percent) 6.3 6.9 Net export (percent of GDP) 3.9 1.7 Net foreign assets (percent of GDP) 4.7 ? Savings (percent of GDP) 21.3 24.5 Did the nominal interest rate increase or decrease in 2015? A. Remained the same. B. Increased. C. Not enough information to decide. D. Decreased