it plateaus off at $980K. Ie with $980K pa income you are above 99.7% of the population.

With a population of 3 million workers (local and foreigners paying taxes here. Source see Demographics of Singapore - Wikipedia which stated Singapore total working population is 3.35 million as of Dec 2012), it translate to 9,000 people earning $980k and above a year.

How many earned $200k a year? With $200k income, you will be above 92.6% of the working population. It would be 222,000 people.

Earned $100k a year? You will be among 12.7% of the working population or about 381,000 people.