That's in the US isn't it?
These are the relevant statistics for the UK:
www.independent.co.uk/life-style/women/sexual-assault-unisex-changing-rooms-sunday-times-women-risk-a8519086.html
"The vast majority of reported sexual assaults at public swimming pools in the UK take place in unisex changing rooms, new statistics reveal.
The data, obtained through a Freedom of Information request by the Sunday Times, suggests that unisex changing rooms are more dangerous for women and girls than single-sex facilities.
Just under 90 per cent of complaints regarding changing room sexual assaults, voyeurism and harassment are about incidents in unisex facilities.
What’s more, two thirds of all sexual attacks at leisure centres and public swimming pools take place in unisex changing rooms.
Of 134 complaints over 2017-2018, 120 reported incidents took place in gender-neutral changing rooms and just 14 were in single-sex changing areas."