In the past year, the number of adults who are online has increased by 5% to an estimated 172 million, according to the latest Harris Interactive poll.

Approximately 77% of Americans are now online, up from 74% in the previous poll in 2005, and compared with 57% back in 2000. When Harris first began to track Internet use in 1995, only 9% of U.S. adults reported they went online. 

 
Just over a third of U.S. adults say they are online at work, little changed from a year ago. Adults who are online at a location other than their home or work also remains steady at 22%. 

The poll also gives a demographic look at who is online in the U.S.: More younger people are online than older people, and the affluent are more likely to be online than those with lower incomes. Those with less education are also less likely to be online, the poll shows.