Also, it is worded like the ol' college rape "statistic" was in the past. "stop college rape, 2 in 5 women" and it turns out they wrapped everything from actual rape to "brushed past them on the sidewalk and bumped their shoulder" to "I had a dream where a guy cheated on me" into the statistic, and not only that, but they simply counted number of incidents versus total population, so one Karen getting pushed out of a mosh pit would count as like 50 women "raped", one per person in the crowd. I'd bet money the "research" methodology done here will be similar:

One woman screams like a psycho in the street, and five people driving by yell "shut the hell up, psycho!", and they note that one incident as five women (one woman x 5 occurances) being called on the street (they never said it had to be one-sided, or complimentary).

WAIT! There's more! It isn't even that, it's "street harassment"! That means a fat guy not walking on the grass and insisting on using the sidewalk too, daring to use her sidewalk, ALSO qualifies as an incident!

EDIT: and "almost" 1 in 2 could also mean 0 in 2 women, even with all those leniencies and hand-wringings. 1 is merely 1 off from 0, so 0 is almost 1. "in 2" is a separate measure completely that doesn't need to be taken into account. This is why statistics are lies, and damned lies. The phrase means NOTHING.

Don't forget 4, which populations do the catcalling on the streets