As someone whose commute includes two towns that were popular drinking centres during the winebar/extended drinking hours boom of the early years of this century (remember the policy of extending drinking hours to encourage a "cafe culture"?), the subsequent decline in the patronage of such establishments and alcohol consumption by the young has reduced considerably the number of rowdy inebriated passengers, and associated incidents usually troubling train crew rather than other passengers, I encounter during the mid-evening late commuter period.
Indeed - I would suggest that it's quite possible to have a decline in the kind of casual, low-level violence that comes from people worse the wear getting shirty with each other and train crew, whilst at the same time having a few incidents getting really nasty, presumably because knives, bottles and other weapons got involved.
Also, it's possible that it's not the number occurring going up, but the number being reported. 20 years ago most would have taken a walkman or wallet being nicked on the chin, but when it's a £600 phone or a £1500 MacBook, insurance needs a crime number and it's a different matter. Also, assault of all kinds is worth reporting when there's
CCTV▸ and a possibility of conviction, especially given the #MeToo movement, plus more sensitive policing.
So not trying to trivialise it, but saying that you can have those statistics but to actually have less chance of being a victim of crime than you were 20 years ago.