Sankey with circular links
s → s Index: 0
sd → s Index: 1
bt → s Index: 2
pb → s Index: 3
s → sd Index: 4
pb → bt Index: 5
s → bt Index: 6
start → bt Index: 7
pg → bt Index: 8
start → pb Index: 9
bt → pb Index: 10
bt → pg Index: 11
start
start 22314
bt
bt 67249
pb
pb 36086
pg
pg 12442
sd
sd 22305
s
s 78368