Name	Notation	Description	Types	Status
Less than 1 hour	0		Concept	stable
1 to less than 2 hours	1		Concept	stable
2 to less than 3 hours	2		Concept	stable
3 to less than 6 hours	3		Concept	stable
6 to less than 9 hours	4		Concept	stable
9 to less than 12 hours	5		Concept	stable
12 to less than 15 hours	6		Concept	stable
15 to less than 18 hours	7		Concept	stable
18 to less than 21 hours	8		Concept	stable
21 to less than 30 hours	9		Concept	stable
Missing value	15		Concept	stable