when was the first census done in india
1871 Census of India The 1872 Census of India was the first comprehensive census of India, then a component of the British Empire. The census has been held every ten years following, with the fifteenth national census held in 2011. This census was preceded by the British decennial census of 1801 and decades of regional surveys in India.[1][2]
Bihar After the 2011 Census, Bihar was the third most populous state of India with total population of 104,099,452 (54,278,157 male and 49,821,295 female). Nearly 89% of Bihar's population lived in rural areas. The density was 1,106. The sex ratio was 918 females per 1000 males.[71] Almost 58% of Bihar's population was below 25 years age, which is the highest in India. Most of Bihar's population belongs to Indo-Aryan-speaking ethnic groups along with few Dravidian-speaking and Austroasiatic-speaking people mostly in Chhotanagpur Plateau (now part of Jharkhand). It also attracted Punjabi Hindu refugees during the Partition of British India in 1947.[72] Bihar has a total literacy rate of 63.82% (75.7% for males and 53% for females), recording a growth of 20% in female literacy over the period of a decade.[73][7]