time	length
10	0.6
20	1.8
30	2.9
40	4
50	5
60	6.1
70	7.9
80	10.1
90	10.9
100	12.7
110	14.4
120	16.6
130	18.1
140	19.9
150	21
160	23.4
170	24.7
180	27.8