I don't worry about the skin color of those in the USA. I care about lower income, lower education families having more kids, and wealthy educated families having fewer kids, and having them older.
The stats explain why. If a person of a certain race doesn't like it, then he/she can go have a lot of sex and make a lot of babies. It's simple people CHOOSING not to have babies. Nothing to be done there.
What worries me is the fact so many LOW INCOME/EDUCATION people are having so many babies - that's a whole generation growing up with fewer advantages and opportunities, and that's a fact. I had the idea years ago - pay $2000 to every girl in high risk areas, at age 13, to take a VOLUNTARY ten-year birth control depo shot. Boom. End teenage pregnancy in areas where that is a problem. And the productivity of a teen without babies means more chance at work, college, self-enrichment. That, and cut welfare when you can - Disincentivize it.
People are gonna have sex, unfortunately, with the decline of morals due to today's social media and politicians of BOTH PARTIES that can't keep it in their pants (or diaper, sen vitter), I don't see that changing.