17.
1st year 15% increase for non-graduate in education
0.15 x 117,000 = 17,550
117,000 + 17,550 = 134,550
2nd year 15% increase for non-graduate in education
0.15 x 134,550 = 20,182.5
134,550 + 20,182.5 = 154,732.5
3rd year 15% increase for non-graduate in education
0.15 x 154,732.5 = 23, 209.875
23,209.875 + 154,732.5 = 177,942.375
4th year 15% increase for non-graduate in education
0.15 x 177,942.375 = 26,691.35
26,691.35 + 177,942.375 = 204,633.73
5th year 15% increase for non-graduate in education
0.15 x 204,633.73 = 30,695.06
30,695.06 + 204,633.73 = 235,328.79
6th year 15% increase for non-graduate in education
0.15 x 235,328.79 = 35299.32
35299.32 + 235,328.79 = 280,628.11
7th year 15% increase for non-graduate in education
0.15 x 270,628.11 = 40,594.22
40,594.22 + 270,628.11 = 311,222.33 is the year 7th