According to the National Chicken Council (www.nationalchickencouncil.org/about-the-industry/statistics/wholesale-and-retail-prices-for-chicken-beef-and-pork), the mean retail price per pound of chicken in 2010 was $1.753. In 2018, the retail price for chicken was $1.873 per pound. Use the 2010 price as the base period and 100 as the base value to compute a simple index. What is the percentage change in the per pound retail price of chicken during the period?