My assumption is a base of 150K and above per annum . Could be lower...
So let's base on 150K/annum. This makes up 11% of the population. The total Singapore workforce is - 1.7Mil as of 2010
Source
http://www.salary.sg/2012/compare-yo...income-latest/
http://www.singstat.gov.sg/pubn/pape...ple/op-s17.pdf
So based on 11% of 1.7Mil = 187K of the population technically qualify for a private property. This are individuals...
If we look at household income, let's assume 13K per month. This works out to be the top 23% of the households. The number of household is 1.146Mil. 23% = 263K can afford a private.
Source
http://www.salary.sg/2012/benchmark-...d-income-2012/
http://www.singstat.gov.sg/stats/keyind.html#hhld
I have not included foreigners yet.
Food for thought.
Key in your own figures to interpolate.
Cheers