With all due respect, I think this is a really bad way to pitch this.
The worst human trafficking offenses tend to occur in the nations shown in green, here, because they're also the wealthiest, and can purchase their people/children/services discreetly and often.
They're merely reported less, due to the wealth and shrewdness of those engaging in the practices.
This graphic makes it seem as if human trafficking is only a serious issue in the third world (and Russia), nothing could be further from the truth. It may make westerners think the problem isn't a serious one, in our own backyards.