Reminder that this still contains a massive statistical problem by grouping known-offender with stranger-assault.
Only 8% of offences are 'in public', and only 15% (against women) by a stranger, but these will form the vast majority among Afghan, MENA, and SSA offences, meaning the true relative multiple is many times higher than these stats suggest.
Put another way, the British population stats capture a huge number of offences by people known to the victim - which is unlikely for the above groups where reporting by victims within family circles is even more discouraged by cultural norms and language barriers, and many will be single males without 'known' female circles.
So the apples to apples comparison would suggest rates are something on the order of 6.5x worse than appears on these charts, even factoring the adjustment for age and gender.
I'm shocked that The Economist was willing to publish this!