Final answer:
The percentage of overqualified immigrant workers in the United States may be significant, while no specific data is provided for Canada.
Step-by-step explanation:
In the United States, there is a wide range of immigrant workers with different educational backgrounds. While some are highly skilled and well-educated, others lack a high school diploma. According to the information provided, about one-third of immigrants over the age of 25 in the United States lack a high school diploma.
As a result, many of these immigrants end up in low-wage, low-skill jobs such as restaurant and hotel work, lawn care, and janitorial work. This means that a significant portion of immigrant workers in the United States may be overqualified for their jobs.
It is important to note that the provided information does not specifically mention the percentage of overqualified immigrant workers in Canada. Therefore, we cannot determine the exact percentage of overqualified immigrant workers in Canada based on the given information.