Worldwide spending on Internet advertising will total $65.2 bln in 2008, which represents nearly 10% of all ad spending across all media. With IDC’s Digital Marketplace Model and Forecast projecting 15-20% annual growth throughout the forecast period, this share will reach 13.6% by 2011 as Internet ad spending grows to $106.6 bln worldwide. The United States will lead the world in both total advertising spending and online ad spending throughout the forecast period with expenditures of more than $265 bln and $45 bln respectively in 2011, according to IDC.