Employees in the United States continue to express elevated concerns about their job security nearly five years after the global financial crisis, according to a new poll.Gallup's annual August Work and Education poll shows that US workers are still worried about having their benefits and wages reduced, their hours cut back, and being laid off. The survey said that 43 percent of workers are concerned about having their benefits reduced. Worries about being laid off, having one's wages reduced, or having one's hours cut back also remain high -- between 25 percent and 31 percent. Workers' concern about the most serious of the possible employment threats measured -- being laid off -- has increased 14 percent since 2008. The Gallup poll also indicates that 11 percent of workers are worried that their company will move jobs overseas and they will lose their jobs to outsourcing. Low-income Americans are concerned the most about employment, with 44 percent now saying they are worried about being laid off. The Labor Department reported that more than half of US states had an increase in their unemployment rates in July, reflecting slow economic growth and a frustratingly weak job market. Moreover, most of the jobs created during the sluggish economic recovery were either part-time or low-paying jobs, according to the Bureau of Labor Statistics.