(LOS ANGELES) - As retailers struggle with a pullback in consumer spending, the economy continues to present new challenges for companies' bottom lines. Preliminary results of the latest National Retail Security Survey, released in June at the National Retail Federation's (NRF) Loss Prevention Conference and EXPO, show that retail shrinkage averaged 1.52 percent of retail sales in 2008, up from 1.44 percent in 2007.