Microsoft’s mobile trouble continue to accelerate — especially in its home country.

Windows Phone has never really had a massive presence in the U.S. (at least not since the Windows Mobile days in 2007, but back then smartphones weren’t selling in enormous quantities either), but in late 2015 Microsoft is hitting an all-time low for sales.

According to Kantar WorldPanel’s latest numbers, Windows Phone market share in the US dipped down to 1.6 percent for December 2015. Just three months earlier in September 2015 that number sat at 3.9 percent.

Windows Phone sales peaked in March 2013 with 5.6 percent share, but momentum soon waned after that period. There was a slight rebound by February 2015 with a 4.8 percent portion, but that too quickly dwindled.