All the K-pop fans, where do they all come from?

During last year's T-ara War I was often wondering who all these people were, the commenters, the battlers. I made guesses (that most were in their teens or twenties, most were female) that I can't confirm; also wondered what countries they were posting from. I was watching the ones who posted in English, which I knew was an international language among Asians in East Asia, as well as among Europeans and North Americans, for communication across borders or — in places like the Philippines and Singapore — across ethnicities and language groupings. Usefully, hyotheleader, one of T-ara's staunchest and effective defenders last August (she* did the hard work of going through faked and out-of-context videos and photos and detailing exactly how they were bogus), has a flag counter appended to her Tumblr (lower right corner), which you can click to get much greater detail. Of course, that's just one person's Tumblr, it's skewed towards T-ara fans, obviously, since it's mostly devoted to reblogs of Hyomin pictures and gifs, and it'll skew towards followers from where Tumblr is most prominent and towards whatever reader trends accumulate on the basis of who started following her early and whom she started following early. Also, not everyone in a country is from that country.** Here are the numbers from a few days ago:

United States 14.9%
Thailand 13.7%
Malaysia 11.1%
Singapore 8.6%
Indonesia 7.9%
Vietnam 5.4%
South Korea 5.1%
Philippines 4.1%
Taiwan 3.0%
Canada 2.7%
Australia 2.1%
China 1.7%
Hong Kong 1.5%
United Kingdom 1.5%
Others 16.5%

( Åland )

*I have to use a pronoun so I'm going with my guess that hyotheleader is a she, based on my feeling about her tone of voice. But I've no actual evidence of her gender.

( Estimating gender from fan chants )