Yes. There is a maximum for the pension. After 20 years of service, you can increase at 1.8% or 2% for every year of service. If you have 30 years of service, you start from 20, and go until 30 years, so you gain 10 years. Because the increment every year is 2%, you can start from 44%, which is the minimum, and then you arrive at 64% for the pension.
On April 20th, 2009. See this statement in context.