Lesser-known "Good" Dictators - Part III

This post is a sequel to 17th June.

Marien Ngouabi (Republic of Congo, 1968-1977)

Under his 9-year rule, real GDP per capita in purchasing power parity terms increased by 50%. As he was said to have established the first Marxist-Leninist state in Africa (according to Wikipedia), it was probably the case that he managed the Soviet-style economic growth (ie. growth solely due to capital accumulation). Actually, the investment rate during his rule was staggering 30 percent on average.