Please answer a question about the following article about Hyderabad:

In the 2005 National Family Health Survey, it was reported that the city's total fertility rate is 1.8,:47 which is below the replacement rate. Only 61% of children had been provided with all basic vaccines (BCG, measles and full courses of polio and DPT), fewer than in all other surveyed cities except Meerut.:98 The infant mortality rate was 35 per 1,000 live births, and the mortality rate for children under five was 41 per 1,000 live births.:97 The survey also reported that a third of women and a quarter of men are overweight or obese, 49% of children below 5 years are anaemic, and up to 20% of children are underweight,:44, 5556 while more than 2% of women and 3% of men suffer from diabetes.:57

What percentage of children in a 2005 survey of people in Hyderabad were underweight?
20%