rownames,type,year,period,service,incidents
1,A,60,60,127,0
2,A,60,75,63,0
3,A,65,60,1095,3
4,A,65,75,1095,4
5,A,70,60,1512,6
6,A,70,75,3353,18
7,A,75,60,0,0
8,A,75,75,2244,11
9,B,60,60,44882,39
10,B,60,75,17176,29
11,B,65,60,28609,58
12,B,65,75,20370,53
13,B,70,60,7064,12
14,B,70,75,13099,44
15,B,75,60,0,0
16,B,75,75,7117,18
17,C,60,60,1179,1
18,C,60,75,552,1
19,C,65,60,781,0
20,C,65,75,676,1
21,C,70,60,783,6
22,C,70,75,1948,2
23,C,75,60,0,0
24,C,75,75,274,1
25,D,60,60,251,0
26,D,60,75,105,0
27,D,65,60,288,0
28,D,65,75,192,0
29,D,70,60,349,2
30,D,70,75,1208,11
31,D,75,60,0,0
32,D,75,75,2051,4
33,E,60,60,45,0
34,E,60,75,0,0
35,E,65,60,789,7
36,E,65,75,437,7
37,E,70,60,1157,5
38,E,70,75,2161,12
39,E,75,60,0,0
40,E,75,75,542,1