I think it depends on the themes.
Germany is the country who spents most money for football world cup articles.
(sticker, shirts..)
Christmas is not in every country the same. So in russia, isnt santa blue dressed?
Asia population is very big, if every creates his own website.. wow.. 

thx 

In my case Europe is clearly the largest market, followed by the US.
Then it's scattered across Australia, Malaysia, China, Russia and Brazil.

I don't see many SS sales from other countries.

I have a high percentage of my image sold in South America... which isn't surprising since I shoot a lot of images of Ecuador

My sales on SS seem to be spread across all continents, with about 1/4-1/3rd in the US (where I'm from), then the rest heavily concentrated in Latin America, Europe and Japan, with a smaller number in the rest of Asia, the Middle East, Australia and Africa.

On Alamy the US accounts for about half my sales, followed by the UK and then Russia, with a smattering from Sweden, Germany and Italy. My first stock photo sale ever was on Alamy and it was a photo of barbed wire licensed to a Russian magazine. Interestingly, I had one sale I found on a Toronto website that I notified Alamy about and they collected on it, but it is listed as a "US" sale, maybe because it's from the US office? So I can't be sure if some of my "US" sales there are to Canada.

On SS, the same photos seem to sell equally well everywhere, US travel and even the NY marathon sell all across the globe, as do my holiday images and backgrounds, and a handful of travel photos from Italy. My Scotland travel images sell best in the UK on Alamy, but otherwise the same images sell equally well in the US and Europe there.