U.S. volume per capita in 1999 was 739 pieces while Italy's was 115 pieces per capita.
Italy's volume per capita was lower than the U.S. because they aren't as large a nation.
mnli hypothesis: Italy's volume per capita was lower than the U.S. because they aren't as large a nation. premise: U.S. volume per capita in 1999 was 739 pieces while Italy's was 115 pieces per capita.