While the British retained much of the Mughal revenue system, they made some drastic changes of detail within its overall structure. The first, though a minor one, was they raised the share of revenue collected enormously. It has been estimated that the total revenue collected from the Bengal Diwani in the first few years of British rule doubled whereas for the last 100 years it had remained the same. This was a huge increase. It is important to remember that this led to severe famines, a third of the population perished, but it is important to note that the revenue collected continued to grow.