Value |
Category |
0 |
NIU (not in universe) |
1 |
1 year of service or less |
2 |
2 years |
3 |
3 years |
4 |
4 years |
5 |
5 years |
6 |
6 years |
7 |
7 years |
8 |
8 years |
9 |
9 years |
10 |
10 years |
11 |
11 years |
12 |
12 years |
13 |
13 years |
14 |
14 years |
15 |
15 years |
16 |
16 years |
17 |
17 years |
18 |
18 years |
19 |
19 years |
20 |
20 years |
21 |
21 years |
22 |
22 years |
23 |
23 years |
24 |
24 years |
25 |
25 years |
26 |
26 years |
27 |
27 years |
28 |
28 years |
29 |
29 years |
30 |
30 years |
31 |
31 years |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.