The Teal Group, an aerospace and defense market analysis firm, said it estimates UAV spending will nearly double over the next decade — from $5.7 billion annually to $9.9 billion annually…Sensor payloads for UAVs, the company said, are forecast to double in value over the next 10 years — from $2.8 billion to $5.6 billion.

Excerpt from Richard Tomkins, Spending worldwide on UAVs to double, study says, UPI, July 18, 2014