Seventy workers lost their lives in the Bay State last year — a rate that hit a 10-year high — and 13 others have already died in 2017, often in situations that were completely preventable, according to a shocking new report.Of the 70 workers who died in 2016, 62 died from fatal injuries and the eight others were firefighters who died from occupational illnesses, according to the Massachusetts AFL-CIO and the Massachusetts Coalition for Occupational Safety and Health.