Canada

You can't just focus on number of workers. You need to take into account the productivity of the workers as well. A farm that's entirely sown and reaped by hand could have 100 workers compared to another farm that has 5 workers with machinery, and yet the one with fewer workers could produce more food and value. It'd be wrong to say the farm with 5 workers is in a dire state just because of their low worker count.

Wikipedia has a list of countries by productivity of workers. While it's not focused on manufacturing specifically, the US has some of the most productive workers in the world and is significantly ahead of Canada. We likely have more workers per capita because each worker is less productive.

Anecdotally, I work at a Canadian manufacturing plant that's owned by an American company. The machines in our plant are from the early 2000s and there's a lot of stuff still done by hand. I've heard the US plants have the most cutting edge machines and produce 2 to 3 times as much product that we do in a day. Apparently, the only reason why the company has not gotten rid of our machines and turned the plant into a warehouse is because they pay Canadian workers comparatively less than their US workers. While the Canadian factories aren't producing nearly as much as their American ones, the cost per unit ends up being less due to lower worker wages.