Looking at more than 900 agencies, Ad Age has released their latest Agency Report for 2013. Of no surprise, digital, which is everything these days, accounted for 35% of U.S. agency revenue. Revenue in general increased 3.7% to $39.1B in 2013, a record. Ad-agency employment is at its highest since 2001 (190,600), and shares of Interpublic, WPP, and Publicis hit all-time highs.