Query - Count drivers grouped by year and month

db2 10 on z/os

I have a table with all driver license information. I need to get a count of drivers who were 16 years old or older grouped by year and month since January 2007. current date - birthday (column in the table) will give me their current age and I can use it to count the number of drivers who are 16+ as of now. But I'm not sure how to do it for every year and month since Jan 2007. Is it possible to do with sql?

Thanks