As discussed in this chapter, real GDP per capita in the United States grew from about $6,000 in 1900 to about $49,200 in 2012, which represents an annual growth rate of 1.9 percent. If the U. S. economy continues to grow at this rate, how many years will it take for real GDP per capita to double? If government economic policies meant to stimulate economic growth result in the annual growth rate increasing to 2.2 percent, how many years will it take for real GDP per capita to double?