As of August 2001, it is estimated that more than 513 million people are 'online'. Below is a break-down by region. If you click on a particular country, you can find out below what which country accounts for the highest percentage in that region, what their peak amount was, and when.

World Total 513.41 million
Africa 4.15 million
Asia/Pacific 143.99 million
Europe 154.63 million
Middle East 4.65 million
U.S. & Canada 180.68 million
Latin America 25.33 million