] Nielsen//NetRatings, the global standard in Internet
] audience measurement and analysis, reports that the
] active Internet population at work grew 17 percent in
] August as compared to a year ago. Nearly 46 million
] American office workers logged onto the Web, the highest
] peak since Nielsen//NetRatings began measuring the
] at-work audience in January 2000.

This is the website for the Nielsen Net Ratings. Several times a month, they post statistics on different aspects of internet usage.