y hardwood pressure
1  196.6        2      400
2  196.0        2      400
3  198.5        4      400
4  197.2        4      400
5  197.5        8      400
6  196.6        8      400
7  197.7        2      500
8  196.0        2      500
9  196.0        4      500
10 196.9        4      500
11 195.6        8      500
12 196.2        8      500
13 199.8        2      650
14 199.4        2      650
15 198.4        4      650
16 197.6        4      650
17 197.4        8      650
18 198.1        8      650
19 198.4        2      400
20 198.6        2      400
21 197.5        4      400
22 198.1        4      400
23 197.6        8      400
24 198.4        8      400
25 199.6        2      500
26 200.4        2      500
27 198.7        4      500
28 198.0        4      500
29 197.0        8      500
30 197.8        8      500
31 200.6        2      650
32 200.9        2      650
33 199.6        4      650
34 199.0        4      650
35 198.5        8      650
36 199.8        8      650