Interesting that the most popular site in Kazakhstan is a russian site. (Mail.ru)
Another interesting thing to measure would be the most popular national website, ie. for denmark, the most popular .dk domain, and then represented in size per population.
EDIT: I'd hypothesize that the top website would be whatever bank has the most customers, or websites for government functions.
Or if you want real local websites, I would assume a newspaper or tv channel website (unless they all live in the .tv domain). Alexa seems to confirm this for Denmark: http://www.alexa.com/topsites/countries/DK.
Considering the number of Russians I know from Kazakhstan, it doesn't surprise me that it's a Russian site. However, it's interesting that its mail.ru and not Yandex. And why VK in Belarus and not Yandex? I realize that VK is enormous and at least in the top 5 most visited sites in Russia.
Another interesting thing to measure would be the most popular national website, ie. for denmark, the most popular .dk domain, and then represented in size per population.
EDIT: I'd hypothesize that the top website would be whatever bank has the most customers, or websites for government functions.