What Is The Social Security Contribution This Year

[Baaksida]

If you have a job in Thailand, every month you have to pay a Social Security Contribution. In return you'll be able to use the services of a local hospital for 30 baht.

Last year it was 3% of my salary/pay. This January, as my work permit wasn't 'completed', I paid about 3.5%. Was the Social Security "Tax" increased for this year, or is the accounting staff doing some major mistake with MY money ?