In 2011, nonresidential building construction provided almost a quarter of the 195,000 jobs for contractors, with average salaries at $45.41 per hour, or $94,450 per year. Building equipment contractors contained 14 percent of the positions at a mean $46.52 per hour, or $96,750 per year.
Burps can also be caused by drinking carbonated beverages, such as beer, soft drinks, energy drinks, and wine in which case the expelled gas is primarily carbon dioxide from the drink itself. Common diabetes drugs metformin and Byetta can cause burping, especially at higher doses. This often resolves in a few weeks.
GERD is caused by laxity of the valve at the junction of the stomach and esophagus. This laxity allows significant amounts of food and stomach acids to flow back into the esophagus, causing burning pain, bloating and frequent burping. It can also cause stomach pain similar to an ulcer.