hour_code	hour_text
000000	All workers
0XXXXX	Hours not reported
10XXXX	Before shift began
1XXXXX	Less than 1 hour
2XXXXX	1 - 2 hours
3XXXXX	2 - 4 hours
4XXXXX	4 - 6 hours
5XXXXX	6 - 8 hours
6XXXXX	8 - 10 hours
7XXXXX	10 - 12 hours
8XXXXX	12 - 16 hours
9XXXXX	More than 16 hours