 Nehru's critics, however, contended that India's import substitution industrialisation, which was continued long after the Nehru era, weakened the international competitiveness of its manufacturing industries.India's share of world trade fell from 1.4% in 1951–1960 to 0.5% over 1981–1990.On the other hand, India's export performance is argued to have actually showed sustained improvement over the period.