• SLM average operating margin for 2023 was 23.13%, a 44.12% increase from 2022.
• SLM average operating margin for 2022 was 41.39%, a 41.8% decline from 2021.
• SLM average operating margin for 2021 was 71.12%, a 92.37% decline from 2020.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.