In 2005,per Capita Real Gross Domestic Product (GDP)in Angola Was

In 2005,per capita real gross domestic product (GDP) in Angola was $3,328.10.By 2006,it had increased to $4,034.31.At what rate did Angola's economy grow in that time?

A) 8.2 percent
B) 21.2 percent
C) 17.5 percent
D) 7.1 percent
E) 10.1 percent