• Canadian National Railway average operating margin for 2023 was 40.22%, a 3.31% decline from 2022.
• Canadian National Railway average operating margin for 2022 was 38.93%, a 3.4% increase from 2021.
• Canadian National Railway average operating margin for 2021 was 37.65%, a 7.11% increase 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.