What is the average life expectancy of a coal miner?

Related questions

1. What is the average salary for a coal miner?
2. How do you know if you have silicosis?
3. Can inhaling dust make you sick?
4. What diseases can you get from coal mining?
5. What does scar tissue in lungs feel like?
6. How do you detect silicosis?
7. What does coal dust do to your lungs?
8. How quickly can you get silicosis?
9. Are symptoms of silicosis obvious?
10. Does silicosis go away?

Tags

1. #average
2. #mines
3. #starting
4. #surface
5. #respectively
6. #those
7. #workers
8. #underground
9. #found
10. #expectancy