Hours in a day = 24
Hours in a week = 168
Hours in a month = 730
Hours in 23 months = 16790.
So not a child every hour at 20,000 at all.
That puts their hours just over 3K out. Which actually makes it 19 months. Which is four months different - quite a lot. That's what...17% off their guess? That's quite a lot.
They can't even get their headline right which rather makes it hard to really trust anything they say. If you are going to make sensationalist headlines, aimed I am sure at generating public condemnation, you should try and get the facts right.
They'd be better off halting the sensationalist headlines and printing accurate facts as they might find people are more receptive to their pleas. Over-exaggerating does no one any favours.