x   y
 1 -0.043
 2 -4.467
 3  0.349
 4 -2.135
 5  5.946
 6 11.086
 7 12.615
 8 13.479
 9 10.764
10 10.392
11  9.024
12  4.169
13 15.589
14 14.515
15 14.086
16 14.135
17  9.916
18 16.641
19 26.713
20 23.816
21 31.020
22 12.290
23 21.795
24 25.626
25 30.015
26 29.550
27 27.041
28 26.068
29 39.081
30 35.268
31 29.313
32 37.351
33 27.626
34 36.159
35 38.614
36 38.766
37 21.055
38 37.741
39 42.649
40 36.866