From 2006 to 2010, Per Capita Real Gross Domestic Product

From 2006 to 2010, per capita real gross domestic product GDP) in Croatia grew an average of 1.08 percent per year. At that rate, according to the Rule of 70, in roughly how many years will the Croatian economy double in size?

A) 65 years
B) 29 years
C) 69 years
D) 51 years
E) 34 years