Year cycle: Calendar year
Note: Overseas movements for 2018 are not reported as 2019's overseas spells records are incomplete, meaning we cannot see return dates for many trips and cannot distinguish whether they are short term holidays or long term spells.
Workforces are defined from IRD tax records each year. These workers are matched to the regional council they have spent the most time in over the year they are working as well as the following year, regardless if they are still working in the industry. Flows of workers are tracked between these regions.