There are wide variations in India's poverty estimates for 1990s, in part from differences in the methodology and in the small sample surveys they poll for the underlying data. A 2007 report for example, using data for late 1990s, stated that 77% of Indians lived on less than 20 a day (about US$0.50 per day). In contrast, S.G.Datt estimated India's national poverty rate to be 35% in 1994, at India's then official poverty line of Rs 49 per capita, with consumer price index adjusted to June 1974 rural prices.