In 1912, Tibet's population was 1,160,000. By 1928 it had fallen to 372,000 - a decrease of 67.9% How and why did Tibet experience such a huge population decline? Was this due to the Chinese Civil War in 1927?
Do you have a source on any of those figures? I have a difficult time imagining that record-keeping in Tibet during that timeframe was very much reliable from what little I know of Tibetan history.