According to Arkham Intelligence, the small South Asian country of Bhutan, with a population of just 800,000 (El Salvador has a population of 6.40 million), owns 12,574 bitcoins worth $1.10 billion at current prices, and Bhutan's bitcoin holdings account for more than a third of the country's GDP (just under $3 billion). El Salvador's holdings of $500 million bitcoins account for only 1.5% of its GDP. According to reports, Bhutan's bitcoin holdings have been accumulated through bitcoin mining because the country has abundant hydroelectric power resources. In September, Arkham reported that Bhutan is likely to become the fourth largest bitcoin holder.