This figure shows the number of cases of CHIKV infection occurring in each month between July 2008 and June 2014. An increase in notifications in 2012–13 is clearly evident from a range of 20 to 63 previously, to 96 cases in 2012–13. Most of the increase was attributable to notifications from WA. Numbers in 2013-14 were similar 2012-13 (94 cases).