Canada's unemployment rate once again defied expectations and fell to a 16-month low in November as a solid gain in part-time jobs boosted the number of people employed for the third time in a row, data showed on Friday. With three months of job gains, the Canadian economy has now added 181,000 new jobs since September, in contrast to almost no change in the first eight months of the year when U.S. tariffs and trade uncertainty choked hiring.