A survey the Iowa Association of Business and Industry conducted shows nearly half its members expect their company’s sales to grow over the next year.In its quarterly business survey, conducted in June, the association found that, of 32 respondents, 47 percent expect sales to expand within a year, with 41 percent expecting sales to remain constant and 12 percent expecting sales to retract.In terms of expected sales growth, the association’s figures represent a 26 percent drop from responses in the previous quarter and a 27 percent drop from responses a year ago.