SIOUX FALLS, S.D. (MITCHELLNOW) The annual Sioux Empire Livestock Show was a big boost for the Sioux Falls economy, according to the Chamber of Commerce. About a thousand people were expected to attend the 72nd annual event over the weekend. Even though it’s free to attend, the livestock show has an economic impact in the millions-of-dollars due to people staying in local hotels, eating at local restaurants, and shopping at local stores, according to the chamber. It wrapped up Sunday at the W.H. Lyon Fairgrounds…