-3	17.5
-2.75	16.03125
-2.5	14.625
-2.25	13.28125
-2	12
-1.75	10.78125
-1.5	9.625
-1.25	8.53125
-1	7.5
-0.75	6.53125
-0.5	5.625
-0.25	4.78125
0	4
0.25	3.28125
0.5	2.625
0.75	2.03125
1	1.5
1.25	1.03125
1.5	0.625
1.75	0.28125
2	0
2.25	-0.21875
2.5	-0.375
2.75	-0.46875
3	-0.5
3.25	-0.46875
3.5	-0.375
3.75	-0.21875
4	0
4.25	0.28125
4.5	0.625
4.75	1.03125
5	1.5
5.25	2.03125
5.5	2.625
5.75	3.28125
6	4
6.25	4.78125
6.5	5.625
6.75	6.53125
7	7.5
7.25	8.53125
7.5	9.625