Although the United States is not the whole world, the result will be nearly the same if I input the same thing in worldwide:
https://trends.google.com/trends/explore?date=today 5-y&q=/m/026pq7,/m/0h68f9g
In worldwide Google Trends, New Zealand searches for Orbiter the most, then Bosnia & Herzegovina, Armenia, Slovakia and Kenya, and ironically, we don't have active forum members from any of the countries.
On the other hand, Estonia searches for KSP the most, then Israel, Czechia, Canada and New Zealand.