The highest levels of education among the adult

(age 25 and over) population in a country were no schooling, 1%; partial primary, 3.4%;

complete primary, 8.8%; incomplete secondary, 22.1%; complete secondary, 43.4%; incomplete higher, 7.6%; and complete higher, 13.7%.

Using the data in Table 6.2, calculate the fraction of wages that represented return to human capital.