These statistics are important when writing economic essays. In general, when asked for a recent assessment of the economy's performance, this relates to the last 10 years of data. However, if asked for current case study's, you can use data from the last 3 years. 

These dates recall the largest and most influential economic events since 2008. For the current statistics, check out the rba snapshot website.

 https://www.rba.gov.au/snapshots/economy-indicators-snapshot/