How many Vault Tec vaults are there?

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Tags

1. #however
2. #vaults
3. #while
4. #american
5. #million
6. #shelters
7. #officially
8. #would
9. #population
10. #almost
11. #commissioned
12. #vault
13. #holocaust
14. #designed
15. #protect
16. #build
17. #nearly
18. #nuclear