Indian Geo; Human population

Human population.
- 80 % of human population lives between 20⁰ and 60⁰ North latitude.
- Ways to measure the human density are as follows –
  - Crude or Arithmetic density. (mostly used)
  - Nutritional or physiological density.
  - Agricultural density.
  - And the economic density.
- India’s average density is 382 people per sq km.
- The Indian growth rate has been divided into four categories –
  - Period of stagnant growth rate (before 1921).
  - Period of steady growth rate (1921-51).
  - Period of rapid growth rate (1951-81).
  - Period of declining growth rate (after 1981).
- Rural area population of India – 68.84%.
- Urban area population of India – 31.16%.
- Urbanized population distribution within states in the decreasing order.
  - Goa (62.17%) > Tamilnadu (48.45%) > Kerala (47.72%) > Maharashtra (45.23%).
- Sex ratio of the county is 943.
- Literacy rate.
  - Overall – 74.04%.
  - Rural areas – 68.9%.
  - Urban areas – 84.9%.