Complex sentence: Some sources identified such a downward trend--from 79 percent in 1970 to about 71 percent in 1991--but both the LPDR's State Planning Commission and the World Bank reported that 80 percent of the labor force was employed in agriculture in 1986.
Split into simpler sentences: Some sources identified such a downward trend--from 79 percent in 1970 to about 71 percent in 1991. Both the LPDR's State Planning Commission and the World Bank reported that 80 percent of the labor force was employed in agriculture in 1986.