MINNEAPOLIS — Competition from big business has replaced “uncertainty” about the future as the chief concern among small-business owners nationally, according to the ninth annual U.S. Bank Small Business Survey. The survey, early in the 10th consecutive year of economic recovery since the Great Recession, found that increasing numbers of small-business owners are confident and investing in their shops and services. “Businesses loathe uncertainty so their confidence in the future is a positive sign,” said Ross Carey, head of business banking at U.S.