20172016201520142013
Same-store sales growth0.5%0.5%0.4%-0.5%2.4%
Same-store sales growth excluding gas1.3%1.0%0.5%-0.4%2.3%

Notes:Same-store sales, referred to by the company as "comparable store sales," includes sales from domestic stores (including relocated, expanded, converted and remodeled) open for more than 12 months and ecommerce sales