Anyone who declines use of the TSA's existing conventional scanner screen will be subject to the new pat-down. The TSA currently screens about 2 million people daily at U.S. airports. The agency doesn’t track how many passengers are subject to pat-down searches after they pass through an imaging scanner.
http://www.zerohedge.com/news/2017-03-03/tsa-launches-invasive-pat-downs-more-intimate-contact