It's currently 53. I checked and found out that MNAs over age 50 currently make up about 70% of the parliamentary representation. In other words, 70% of MNAs are 50 or older. The average age is 53 years old. The 18-39 age group—young people—currently represent 10%, which isn't very high.
On May 5th, 2016. See this statement in context.