This figure shows the trend of notifications received by the National Notifiable Disease Surveillance System from 1991 to 2012. The figure demonstrates a gradual increase over time from 43,719 notifications in 1991 to 159,408 notifications in 2008. In 2009 notifications peaked at 237,268 decreased slightly in 2010 to 209,967 and peaked again in 2011 with 238,515 notifications. In 2012 the notifications increased to 243,872 which is the highest year total of notifications since 1991.