The three sectors of Indian Economy are – primary sector, secondar sector and tertiary sector.

The primary sector includes activities such as agriculture, forestry, fishing, mining, and quarrying. In 1950–51, this sector contributed 56.70% of India’s GDP, which shows that the economy was mainly dependent on agriculture.

Over time, the share of the primary sector steadily declined:

• 52.48% in 1960–61
• 46.00% in 1970–71
• 39.93% in 1980–81
• 34.05% in 1990–91
• 26.18% in 2000–01
• 16.93% in 2009–10

This means that over a period of about 60 years, the share of the primary sector reduced to nearly one-third of its original level. This decline is considered a sign of healthy economic development. It indicates that the economy is moving away from being dependent on raw materials and is gradually shifting towards manufacturing and processing activities, which generate higher value.

Slow Growth of the Secondary Sector

The secondary sector, which includes manufacturing and industrial activities, has grown very slowly.

• In 1950–51, its share was 13.66% of GDP
• After 60 years, it increased to only 25.77%

During the 1970s and 1980s, the share of the secondary sector remained mostly between 20% and 22%. In the 1990s, there was very little change, and the sector almost remained stagnant. Even in recent years, its share has stayed around 25% of GDP.

This shows that while agriculture’s importance declined, industrial growth in India has been slow. The structural change in the economy is marked by a shrinking agricultural sector but only gradual development of industry.

Rapid Growth of the Tertiary Sector

The tertiary sector includes services such as trade, commerce, transport, banking, education, and other related activities.

This sector has shown strong and rapid growth:

• It contributed 29.64% of GDP in 1950–51
• It increased to 57.30% in 2009–10

This means that the share of the services sector has almost doubled over time. However, in the early decades (1950s, 1960s, and 1970s), the increase was small—only about 5%. Most of the growth in this sector has taken place in the last two decades.

This clearly shows that the tertiary sector has benefited the most from structural changes in the economy.

Growth Rates of Different Sectors

Looking at the growth rates gives a clearer picture of economic changes.

• The overall GDP grew at an average rate of 4.46% per year over the last 50 years
• The primary sector grew at 2.74% per year
• The secondary and tertiary sectors grew at more than 5% per year

This means that the growth rate of industry and services has been almost double that of agriculture.

Simple Understanding

• Agriculture share ↓ (declining steadily)
• Industry share ↑ slowly (weak growth)
• Services share ↑↑ (fast growth)
• Economy shifting towards a service-based structure