I doubt it's that many. Although there has been an increase in Russian adoptions, it pales in comparison to the increase in countries like China and Guatemala. In the early 90's the number of children adopted from Russia rarely reached 1000. Last year the number was a little under 6,000.
One of the reasons Americans look to a country like Russia is that there are virtually no "rules" age, marital status, etc. This can be a very good thing but it is obviously open to a lot of abuses.
Another reason people are sometimes drawn to Russia is they don't want to give up their dream of a caucasian child.
There are many, many warm and loving people who've gone to Russia to add children to their families, and I mean no disrespect to them. But there's also a lot of racist losers who couldn't or wouldn't qualify for other countries.
Speaking from experience, if you go through a reputable agency, it is VERY difficult to adopt from Russia. Korea (a non-caucasian country) is much easier -- no travel involved, the child can be escorted here.
My husband and I had to travel to Russia, endure examinations of our entire lives and relationships and those of our relatives, etc., before we could bring our daughter home.
We went to Russia because that's where our daughter was.
We were NOT told the entire truth about her because the lives of these children are unimaginably sad and because the authorities there have an entirely different viewpoint on children in orphanages than we do here.
And maybe the people who choose to adopt white children do so not because of themselves, but because of the communities and families they live in.