• Service average pre-tax profit margin for 2023 was 16.35%, a 26.52% decline from 2022.
• Service average pre-tax profit margin for 2022 was 22.25%, a 8.1% decline from 2021.
• Service average pre-tax profit margin for 2021 was 24.21%, a 44.11% decline from 2020.

Pre-tax profit margin can be defined as earnings before taxes as a portion of total revenue.