0-10 |o 11-15 |. 16-20 |OOO 21-25 |OOOOOOOOOOO 26-30 |OOOOOOOOOOOOO 31-35 |OOOOOOOO 36-40 |OOOO 41-45 |OO 46-50 |O 51-55 |O 56-60 |o 61+ |o