As was the case with the growth in national output, the pace of growth has slowed markedly since the 1960s. The rate declined from 41.7% and 36.6% a year during the Three-Year Plan and Five-Year Plan, respectively, to 12.8%, 16.3%, and 12.2%, respectively, during the First Seven Year Plan, Six-Year Plan, and Second Seven-Year Plan. As a result of faster growth in industry, that sector's share in total national output increased from 16.8% in 1946 to 57.3% in 1970. Since the 1970s, industry's share in national output has remained relatively stable. From all indications, the pace of industrialization during the Third Seven-Year Plan up to 1991 is far below the planned rate of 9.6%. In 1990 it was estimated that the industrial sector's share of national output was 56%.