6 levels.

The Provident Fund is a social security system provided to employees in my country to help them solve their housing problems.

According to the "Housing Provident Fund Management Regulations", the payment levels of provident fund are divided into six levels, namely the first level, the second level, the third level, the fourth level, the fifth level and the sixth level, corresponding to

The deposit ratios are 5%, 6%, 7%, 8%, 9% and 10% respectively.