Figure 4 shows trends in vaccination coverage estimates for individual vaccines at 60 months of age from 2002-2012. There was a marked increase in coverage for individual vaccines at 60 months of age following the change in the due/overdue rules in January 2009, with coverage increasing to levels similar to when coverage was assessed at 72 months of age. Coverage for all individual vaccines is at almost 92% in 2012, probably related, in part, to completed immunisation by 48 months of age being introduced in 2009 as a requirement for GP incentive payments.