First become a star in China, now in the U.S 530e iPerformance become BMW BMW Group increased plug-in car sales in the U.S. last month to 2,774 (up 2.0% year-over-year), but the overall share in total volume remains 7.5%. The result for the full year of 2018 exceeds 25,000 at a growth rate of 17.9% and average share out of total volume of over 7%.