Line graph demonstrates mumps notification and hospitalisation rate per 100,000 and year of diagnosis/admission (1999 to 2012 for notifications and 1999 to 2011 for hospitalisations), for Western Australia. Notification rates in Western Australia decrease from 4.4 per 100,000 in 2008 to 0.9 per 100,000 in 2009, and remain below 1.0 per 100,000 through to 2012. Hospitalisation rates range from 0.3 to 0.6 per 100,000 over the 2008 to 2011 period.