• Service average net profit margin for 2023 was 12.37%, a 26.93% decline from 2022.
• Service average net profit margin for 2022 was 16.93%, a 9.22% decline from 2021.
• Service average net profit margin for 2021 was 18.65%, a 42.48% decline from 2020.

Net profit margin can be defined as net Income as a portion of total sales revenue.