US giant Tricon Global Restaurants yesterday [Thursday] reported that US blended same-store sales at company restaurants are estimated to have increased by 6% during the four-week period ended 23 February 2002. For the comparable four-week period, US same-store sales also increased at Tricon fastfood subsidiaries; 9% at Taco Bell, 6% at Pizza Hut, and 2% at KFC.