50岁以下：36%*(OW) + 36%*(AW）,其中36%*OW up to a maximum of $1800;
50-55岁：32.5%*(OW) + 32.5%*(AW）,其中32.5%*OW up to a maximum of $1625；
55-60岁：23.5%*(OW) + 23.5%*(AW）,其中23.5%*OW up to a maximum of $1175；
60-65岁：14.5%*(OW) + 14.5%*(AW）,其中14.5%*OW up to a maximum of $725；
65岁以上：11.5%*(OW) + 11.5%*(AW）,其中11.5%*OW up to a maximum of $575；
CPF is computed up to OW Ceiling of $5000.
OW - Ordinary Wage,月缴纳CPF按照$5000封顶；
AW - Additional Wage，年缴纳CPF上限按照（$85,000 - 年OW缴纳的CPF）
The AW Ceiling from 2012 is provided below:
$85,000* - Total Ordinary Wages subject to CPF for the year
*Equivalent to 17 months x $5,000
