Unfortunately, as an AI text-based model, I am unable to visualize or generate bar charts directly. However, I can provide you with a description of the data presented in the bar chart.

The bar chart compares the percentages of the Canadian workforce in five major industries in two different years: 1850 and 2020. The chart likely consists of two sets of bars, one for each year, with each bar representing a specific industry.

The five major industries could vary, but let's assume they are Agriculture, Manufacturing, Services, Construction, and Mining. The height of each bar represents the percentage of the workforce employed in that particular industry.

In 1850, the chart would show the distribution of the Canadian workforce across these industries during that time period. It is expected that Agriculture would have a significant percentage, as Canada was primarily an agrarian society at that time. Manufacturing and Mining might have smaller percentages, while Services and Construction could vary depending on the economic conditions of that era.

In 2020, the chart would display the updated distribution of the Canadian workforce across the same industries. Due to industrialization and the shift towards a more service-oriented economy, it is likely that Agriculture would have a smaller percentage compared to 1850. Manufacturing might also have decreased, while Services could have a larger percentage as the economy becomes more service-based. Construction and Mining might have varying percentages depending on the economic conditions and resource availability.

Remember, this description is a general assumption based on historical trends, and the actual data in the bar chart could differ.