as its official name. The reason for the victory of the Justice Party in elections was the non-participation of the INC, demanding complete independence of India. The Justice Party which was under E. V. Ramasamy was renamed Dravidar Kazhagam in 1944. It was a non-political party which demanded the establishment of an independent state called Dravida Nadu. However, due to the differences between its two leaders E. V. Ramasamy and C. N. Annadurai, the party was split. Post-Independence C. N. Annadurai left the party Dravida Kazhagam to form the Dravida Munnetra Kazhagam (DMK). The DMK decided to enter politics in 1956. After the demise of C. N. Annadurai, M. Karunanidhi became the leader of the party which was supported by majority leaders including then famous actor M. G. Ramachandran. As a breakaway faction of the DMK, in 1972, M. G. Ramachandran founded the new Dravidian party All India Anna Dravida Munnetra Kazhagam (AIADMK) named after his political mentor C. N. Annadurai popularly called "Anna". After the demise of M. G. Ramachandran, J. Jayalalithaa succeeded the leadership of the AIADMK party and was fondly called Amma (The Mother) by millions. Demographics Tamil Nadu is the seventh most populous state in India. 48.4 per cent of the state's population lives in urban areas, the third-highest percentage among large states in India. The state has registered the lowest fertility rate in India in the year 2005–06 with 1.7 children born for each woman, lower than required for population sustainability. At the 2011 India census, Tamil Nadu had a population of 72,147,030. The sex ratio of the state is 995 with 36,137,975 males and 36,009,055 females. There are a total of 23,166,721 households. The total children under the age of 6 is 7,423,832. A total of 14,438,445 people constituting 20.01 per cent of the total population belonged to Scheduled Castes (SC) and 794,697 people constituting 1.10 per cent of the population belonged to Scheduled tribes (ST). The state has 51,837,507 literates, making the literacy rate 80.33 per cent. There are a total of 27,878,282 workers, comprising 4,738,819 cultivators, 6,062,786 agricultural labourers, 1,261,059 in house hold industries, 11,695,119 other workers, 4,120,499 marginal workers, 377,220 marginal cultivators, 2,574,844 marginal agricultural labourers, 238,702 marginal workers in household industries and 929,733 other marginal workers. India has a human development index calculated as 0.619, while the corresponding figure for Tamil Nadu is 0.736, placing it among the top states