Penske Automotive Group released its fourth-quarter and full-year financial results on Thursday, claiming 2015 as the most profitable year in company history.

This was powered, in part, by an 8.98-percent year-over-year increase in total global used-vehicle sales, which reached 198,459 units. This contributed to the group’s increase in total automotive retail units of 11.9 percent compared to 2014. Excluding foreign exchange, Penske’s total revenue in 2015 increased by 14 percent.

Roger Penske, the group’s chairman, highlighted the impetus behind his company’s year of growth.

“The diversification provided by our business model continues to drive our business forward,” he said. “Our U.K.-based retail automotive and U.S.-based commercial truck businesses produced exceptional results, and the stability of the parts and service business helped our business produce another solid quarter. We expect 2016 will be another solid year for both automotive and U.S. commercial truck sales.”

Here’s a breakdown of Penske Automotive’s fourth-quarter and full-year 2015 results, from the used-car sales angle, on a global scale.

 According to a release from Penske, the group acquired retail automotive franchises and U.S. commercial truck dealerships that are expected to generate roughly $500 million in estimated annualized revenue.