Internet Explorer 6 has finally dropped to less than 5 percent share in the US, new data from StatCounter shows. The browser from 2001 has sunk to just over 4.7 percent in May. It accompanies an even faster decline from IE7, which dropped most of a point to 16.6 percent; only IE8 gained share among Microsoft's browsers, crossing the 30 percent mark for the first time to reach 30.5 percent of use.