Growth in the RPI was buoyed by the same-store sales and customer traffic indicators, which both improved for the second consecutive month.

The RPI stood at 101.1 in November, up slightly from a level of 100.9 in October.

The RPI stood at 100.9 in May, up 0.6 percent from a level of 100.3 in April.

Six in 10 operators reported higher same-store sales; Operators' outlook for sales growth and the economy improved from recent months.

Same-store sales remained positive; operators less optimistic about the economy.

Stronger same-stores sales and customer traffic levels drive boost.

Same-store sales and customer traffic levels were dampened by winter storms in February, but restaurant operators are more optimistic about future business conditions.

Restaurant operators reported positive same-store sales and customer traffic levels; Outlook for sales growth and the economy continued to strengthen.

RPI stood above 100 for the 20th consecutive month, which signifies expansion in the index of key industry indicators.