From a very good article from T Ramavarman in Times of India,
The poverty level in Kerala was among the worst in the country with about 72.58 per cent of the people living below the poverty line in the mid-1960s. It came down to 11.3 per cent in 2011-12.
And on the much discussed Kerala land reforms,
The original expectation of the first EMS Government (1957) was to acquire and distribute 720,000 acres of land. In reality, by 1991, the government could acquire only 93,178 acres. Up until 1995, the government redistributed only 64,237 acres. The Dalits were practically left out in land redistribution program.