Since 2018, the PJSM data have been rebenchmarked every year to reflect the most recently available release of Estimated Resident Population (ERP) data and Labour Force Survey population benchmarks. The data for 2015 to 2021 have been revised to incorporate the population benchmarks that were used to produce estimates published in the April 2021 Labour Force, Australia.
To reduce the impact of seasonal effects on total employment, underemployment and unemployment, the benchmarks have been adjusted by factors based on seasonally adjusted Labour Force Survey estimates (as published in April 2021). For example, February estimates have a typical seasonal pattern of higher unemployment. The factors applied reduce the number of unemployed, to align with seasonally adjusted LFS estimates.
Trend series factors would usually be used in PJSM benchmarks but are currently not available, during the COVID period. Seasonally adjusted factors will be used until trend series are reinstated in Labour Force statistics.