Ankeny, Iowa-based Casey’s General Stores Inc. plans to increase its total number of stores by 4 percent to 6 percent in fiscal 2013. Through the first nine months of the fiscal year, the company opened 18 newly constructed stores and 21 acquired stores, and replaced 22 stores. Currently, Casey’s has 21 new stores and 12 replacement stores under construction, as well as 10 stores under written agreement to acquire. The company also has 50 new sites and 25 replacement sites under contract to purchase.