Two reasons for the decline in production were the droughts and accompanying famine occurring in 1980–91, and the influx of more than 1 million refugees from Eritrea, Ethiopia, Chad, and Uganda. This was in addition to the persons displaced by the Second Sudanese Civil War, which had resumed in 1983, who were estimated to number between 1.5 million and 3.5 million. Nevertheless, the decline in Sudan's agricultural and industrial production had begun before these calamities. Few development projects were completed on time, and those that were completed failed to achieve projected production. Sudan found itself in a cycle of increasing debt and declining production.