3-6 MONTHS 2 6-9 MONTHS 2 9-12 MONTHS 2 12-18 MONTHS 2 18-24 MONTHS 3 2 YEARS 4 3 YEARS 4 4 YEARS 4 5 YEARS 4 6 YEARS 4 7 YEARS 3 8 YEARS 3 9 YEARS 3 10 YEARS 2 11 YEARS 2 12 YEARS 4 13 YEARS 3 14 YEARS 5 15 YEARS 2 16 YEARS 2