In 2009 the first tiger survey counted 121 tigers. In this year, they set up Banke national park, to extend a reserve in the area called Bardia national park. The two combined protect about 860 square miles of land.
A survey from 2018 counted 235 individual animals. Unless there has been a total breakdown, and poaching has started up, this is likely to be well about doubling the population by now.