Department of Labor.
The department of labor can determine whether the workers really need protective gear or not, if they do, then they will request that they be provided with such equipment.
The correct answer is 10%.
Sometimes these numbers were higher, sometimes they were lower, but in general, good economic years hovered around 10% which was not so bad for the society since it's impossible to reduce it to 0% and it is also easy for it to go way over 10%, so the 10% mark was acceptable for numerous countries in Europe.
