Daniel Dale, the great Washington Bureau Chief of the Toronto Star, has steadfastly tracked Trump’s propensity to lie since his first day in office. He has maintained a running database on all of Trump’s falsehoods. His dedication to this beat enabled him to quantify exactly how often the president spreads false claims.

Dale calculated that in 2017 Trump lied 3.8 percent of the time he communicated. In 2018, that percentage rose to 7.3.

https://www.rawstory.com/2018/07/trumps-lies-spiraled-control-mueller-probe-closes-researchers/