Electric vehicles are making up an ever-increasing percentage of BMW's sales, both here in the US and worldwide, according to a statement released by the company on Friday. In April in the US, the BMW i3, i8, and X5 xDrive 40e accounted for just under 15 percent of all BMW passenger vehicle sales—a combined 2,572 cars out of a total of 17,786 cars sold last month.

More than half of BMW's EVs have been sold here in the US, which, along with Scandinavia and the UK, is the company's best market for hybrids and EVs. BMW's electrification strategy is a two-fold affair. There's the i sub-brand, which currently features the i3 city car and i8 sports car (two of our favorites here at Ars), and it's believed that a third i model is in the works, a crossover called the i6.

The company is also building hybrid versions of some of its regular vehicles, including the 330e, X5 xDrive40e, and now a 740e as well.

That's a spot of good news for the company. In the same announcement, BMW also revealed that overall car sales in the US have dropped by 10.1 percent compared to April 2015. Worldwide, i3 sales were up more than 50 percent, and total i sales were up almost 30 percent for the same time periods.

At the beginning of May, BMW revealed that the i3's biggest weak point—the car's paltry range—will be addressed by a mid-life upgrade that bumps battery capacity by 50 percent (33kWh vs 22kWh). However, while that release originally said that existing models would be able to be retrofitted with the new battery, BMW USA has yet to follow suit.