The Department of Labour is responsible for recording strike activity, which they source from their reports and media. During 2011, a total of 67 work stoppages were captured. This reflects a slight decrease to the 74 recorded in the previous year 2010. The number of working days lost to work stoppages in 2011 also decreased to 2 806 656 working days (involving 203 238 employees), compared with a record 20 674 737 that was lost in 2010 (involving 1 191 813).

See report from the DOL for more info.