Table:
text: Multi-stage fitness test
Calculations
Calculations
Level_ Shuttles Cumulative_Shuttles Speed_km_h Shuttle_Time_seconds Total_level_time_s Distance_m Cumulative_Distance_m Cumulative_Time_min_and_seconds
1 7 7 8.0 9.00 63.00 140 140 1:03
2 8 15 9.0 8.00 64.00 160 300 2:07
3 8 23 9.5 7.58 60.63 160 460 3:08
4 9 32 10.0 7.20 64.80 180 640 4:12
5 9 41 10.5 6.86 61.71 180 820 5:14
6 10 51 11.0 6.55 65.50 200 1020 6:20
7 10 61 11.5 6.26 62.61 200 1220 7:22
8 11 72 12.0 6.00 66.00 220 1440 8:28
9 11 83 12.5 5.76 63.36 220 1660 9:31
10 11 94 13.0 5.54 60.92 220 1880 10:32
11 12 106 13.5 5.33 64.00 240 2120 11:36

text: Multi-stage fitness test
Calculations
Calculations
Level_ Shuttles Cumulative_Shuttles Speed_km_h Shuttle_Time_seconds Total_level_time_s Distance_m Cumulative_Distance_m Cumulative_Time_min_and_seconds
12 12 118 14.0 5.14 61.71 240 2360 12:38
13 13 131 14.5 4.97 64.55 260 2620 13:43
14 13 144 15.0 4.80 62.40 260 2880 14:45
15 13 157 15.5 4.65 60.39 260 3140 15:46
16 14 171 16.0 4.50 63.00 280 3420 16:49
17 14 185 16.5 4.36 61.09 280 3700 17:50
18 15 200 17.0 4.24 63.53 300 4000 18:54
19 15 215 17.5 4.11 61.71 300 4300 19:56
20 16 231 18.0 4.00 64.00 320 4620 21:00

Question: What is the highest possible level for the multi-level fitness test?