Gender pay gap based on median hourly earnings in New Zealand

Gender pay gap: difference calculated as the income of males minus the income of females, divided by the income of males. This only includes wages and salaries.
Median hourly earnings (wages): The middle point of the distribution of hourly earnings. For example, if 99 people receive wage and salary earnings, the median hourly earnings are the hourly earnings of the 50th person - when people are ranked by hourly earnings.

The data refers to the hourly and weekly income of individuals who are employed and are receiving income from wages and salaries.

https://datainfoplus.stats.govt.nz/Item/example.org/8d1f8525-746e-43cd-ad82-81a96f46225f/

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The income information is collected as part of the Household Labour Force Survey each year during the June quarter. This information only covers income from wages and salaries, self-employment, and government transfers.
This dataset in particular refers to the hourly and weekly income of individuals who are employed and are receiving income from wages and salaries, or self-employment.

The period of surveying/interviewing for the June quarter is the 13 weeks between April and June (inclusive). Income information obtained relates to the respondent's most-recent pay period, except for questions on annual income, and self-employment income which cover the 12 months before the interview.