The U.K. uses 424 megabytes of data each month a 60% hike from last year. Second-runner-up Japan uses 392 megabytes per month, and the U.S. places sixth using 319 megabytes of data, The Guardian reports.
Ofcom also found that U.K. Internet users spend, on average, 728 minutes a week online, a slight drop from last year's average of 746 minutes.
The increase in data usage could stem from U.K. users accessing television via Internet in high quantities (even more than the U.S.), Ofcom suggests. The Financial Times also reports that the U.K. has "one of the highest levels of penetration of smartphones in the world at 58% of the population, while just fewer than one in five owns a tablet computer."
The FT adds that there has been recent criticism of the U.K. stalling in rolling out 4G mobile networks, which are better equipped to deal with the heavy data usage of the country's residents.