time	y
1	0.5
2	2.0
3	3.8
4	3.8
5	4.8
6	5.3
7	5.7
8	6.8
9	6.1
10	8.6
11	8.1
12	10.0
13	11.6
14	10.1
15	11.5
16	10.1
17	11.9
18	9.1
19	13.6
20	12.9
21	11.9