that's why I chose it as an example to compare with the wage of somebody who does hard physical labor underground with a significantly higher chance of injury https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4667042/ - relevant quote:
"However, there is still a relatively high incidence of labour accidents during tunnel construction when compared to incidence rates in the construction industry in general. During tunnel construction, rock fall events at the cutting face are a particularly characteristic of the type of accident that occurs."
that's why I chose it as an example to compare with the wage of somebody who does hard physical labor underground with a significantly higher chance of injury https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4667042/ - relevant quote:
"However, there is still a relatively high incidence of labour accidents during tunnel construction when compared to incidence rates in the construction industry in general. During tunnel construction, rock fall events at the cutting face are a particularly characteristic of the type of accident that occurs."