20182017201620152014
Same-store sales growth9.4%4.4%1.0%3.0%5.0%
Same-store sales growth excluding gas7.4%3.7%3.0%6.0%5.0%

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