The log wage distribution (adjusted for inflation) is put into 99 percentiles (x-axis horizontally), and the difference is taken between those boundaries in 2021 vs 2000, and in 2021 vs 2017. This approximates percentage changes.
Access to the data used in this study was provided by Stats NZ under conditions designed to give effect to the security and confidentiality provisions of the Statistics Act 1975. The results presented in this study are the work of the author, not Stats NZ or individual data suppliers.
Source:Stats NZ - HLFS (via the IDI)