Whereas United States economic productivity grew at an annualrate of 3 percent from 1945 to 1965, it has grown at an annualrate of only about 1 percent since the early 1970s.
Over the past three decades the number of students leaving home each year to study abroad has grown at an annualrate of 3.9 percent, from 800,000 in 1975 to 3.5 million in 2008．
Over the past three decades, the number of students leaving home each year to study abroad has grown at an annualrate of 3.9 percent, from 800,000 in 1975 to 3.5 million in 2008．