North Korean imports of laptops surged in December 2014, more than doubling their November counterparts, driving totals for 2014 to their highest since 2011, prior to which no data is available, Chinese customs figures show.

Overall North Korean imports of laptops rose to more than $22 million, a 10 percent increase over 2013. The average value of the laptops was just short of $200 per unit, though varied within 2014, peaking at over $240 in June and generally getting cheaper after that point.

“I can’t be sure about what kind of computer model they are using, but it seems they are using various