Construction related contractors made the list. Real estate in US represents about 13% of our GDP. Contractors are always in demand. When you drive cross town and see construction sights just think about how many different contraltos are involved in those projects – site cleaning and preparation, framing, masonry, roofing, plumbing, HVAC, electrical, drywall & painting, cleaning, general contractor, concrete, flooring and tile, kitchen cabinet, crown & molding