12% of US broadband households have an Amazon Echo or similar device

"Parks Associates today announced new smart home research showing that the adoption rate of smart speakers with voice assistants grew from 5% of U.S. broadband households in Q4 2015 to 12% in Q4 2016. Voice Assistants and Technologies: Ecosystem and Market Leaders examines the growing market for these smart home devices and the impact of voice control as a major market transformation in both the user experience (UX) and user interface (UI).
“In the past five years, voice control and voice-based technologies have experienced massive growth in the consumer market, igniting the competitive landscape among current and emerging smart home players,” said Dina Abdelrazik, Research Analyst, Parks Associates. “Voice interfaces are advancing due to continued improvements in machine learning and natural language processing, paired with the prevalence of portable devices. Apple increased consumer familiarity of voice control with its introduction of Siri in 2011, but the later-to-market Amazon Alexa has taken a clear lead in this category.”"
Source:  Parks Associates, 21st March 2017