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Codes and Frequencies



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0NIUXXXXXX
1Never or almost neverXXXXXX
2Some daysXXXXXX
3Most daysXXXXXX
4Every dayXXXXXX
7Unknown-refusedXXXXXX
8Unknown-not ascertainedXXXXXX
9Unknown-don't knowXXXXXX