0 0 LESS THAN OR EQUAL TO 10%
1 1 GREATER THAN 10% BUT LESS THAN OR EQUAL TO 20%
2 2 GREATER THAN 20% BUT LESS THAN OR EQUAL TO 30%
3 3 GREATER THAN 30% BUT LESS THAN OR EQUAL TO 40%
4 4 GREATER THAN 40% BUT LESS THAN OR EQUAL TO 50%
5 5 GREATER THAN 50% BUT LESS THAN OR EQUAL TO 60%
6 6 GREATER THAN 60% BUT LESS THAN OR EQUAL TO 70%
7 7 GREATER THAN 70% BUT LESS THAN OR EQUAL TO 80%
8 8 GREATER THAN 80%
15 15 MISSING VALUE
