Despite this growth in activity, the growth of the online population itself has slowed. There was almost no growth over the course of 2002 and there has been only a small uptick in recent months to leave the size of the online U.S. adult population at 63% of all those 18 and over. More than three-quarters of those between the ages of 12 and 17 use the Internet. The number of American adults going online grew by 47% between our March 2000 and August 2003 surveys. However, growth in Internet penetration was relatively flat over the course of 2002.