The Six-Year Plan of 1971–1976 followed immediately in 1971. In the aftermath of the poor performance of the preceding plan, growth targets of the Six-Year Plan were scaled down substantially. Because some of the proposed targets in the First Seven-Year Plan had not been attained even by 1970, the Six-Year Plan did not deviate much from its predecessor in basic goals. The Six-Year Plan placed more emphasis on technological advance, self-sufficiency ("Juche") in industrial raw materials, improving product quality, correcting imbalances among different sectors, and developing the power and extractive industries; the last of these had been deemed largely responsible for slowdowns during the First Seven-Year Plan. The plan called for attaining a self- sufficiency rate of 60–70% in all industrial sectors by substituting domestic raw materials wherever possible and by organizing and renovating technical processes to make the substitution feasible. Improving transport capacity was seen as one of the urgent tasks in accelerating economic development—it was one of the major bottlenecks of the Six-Year Plan.