What is the number on?
The number is on the meter.
    src        edge_attr  dst
0     0   to the left of    2
1     0  to the right of    1
2     0               on   15
3     0   to the left of    3
4     1   to the left of   10
5     1   to the left of   15
6     1   to the left of    0
7     2               on    3
8     2  to the right of    0
9     2  to the right of   15
10    3  to the right of    5
11    3  to the right of   15
12    3  to the right of    0
13    3  to the right of    6
14    4               on    3
15    4  to the right of    5
16    4  to the right of   15
17    5               on   15
18    5   to the left of    3
19    5   to the left of    4
20    6   to the left of    3
21    7   to the left of   12
22    7   to the left of   13
23    7   to the left of   14
24   10  to the right of    1
25   12  to the right of    7
26   12   to the left of   14
27   13  to the right of    7
28   14  to the right of   12
29   14  to the right of    7
30   14               on    9
31   15   to the left of    4
32   15   to the left of    2
33   15  to the right of    1
34   15   to the left of    3