Ohio ranks below the national average and is the seventh worst state regarding smoke free workplaces. A study conducted by the US Census Bureau for the National Cancer Institute shows 63 percent of Ohio workers were in smoke free environments in 1999, compared with 69 percent nationwide. Utah has the highest incidence of smoke free workplaces with 84 percent. Nevada ranks last with 49 percent. Although Ohio's numbers are worse than most other states', they have improved. In 1993, 38 percent of workers reported smoke free workplaces. That figure rose to 56 percent in 1996. University of California-San Diego Professor David M Burns, who helped analyze the data, says the progress is good news.