Sales of the two BMW "i" plug-in electric models have been fairly good over the past year, and that's leading the company to reach for a more ambitious goal.

BMW aims to double sales of its i3 electric car and i8 plug-in hybrid in the U.S. this year--which represents their first full calendar year on sale.

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While the i3 logged 6,092 sales from May through December 2014, BMW hopes to sell 12,000 of the i3 battery-electric and i3 REx range-extended small hatchbacks in 2015.

And it plans to sell 1,000 i8 plug-in hybrid sport coupes in the U.S. this year, after shifting 555 from August through December 2014.

2015 BMW i3

2015 BMW i3

The company is seeing strong demand for both electric models, BMW North America CEO Ludwig Willisch said in a recent interview with Automotive News (sub. required).

The i3 was designed primarily as a city car, but it appears to be more popular in less-urban areas where it may be easier to find public charging stations.

In a trend that surely pleases BMW, the i3 is selling well in areas of California, Florida, and Texas that are outside large cities.

RELATED: BMW i8 Plug-In Hybrid Coupe Production Will Double To Meet Demand

Two California dealers--Crevier BMW in Santa Ana and Stevens Creek BMW in Santa Clara--have even opened standalone "i" showrooms.

Yet while California has embraced the "i" models, as it has all other plug-in cars, sales in the older cities of the Northeast have reportedly been below expectations.

New York City in particular has proven less enthusiastic about the "i" models than BMW originally anticipated.

2015 BMW i8

2015 BMW i8

As for its sexy plug-in hybrid, BMW recently doubled production of the i8 coupe at the Leipzig, Germany, factory that builds both models.

It did that to decrease wait times for the car, which it felt were unacceptably long and could prove a deterrent to the car's public image.

SEE ALSO: Is BMW i3 Electric Car Selling Better In U.S. Than Germany?

With its $137,450 U.S. base price, the i8 will continue to be a low-volume model for BMW, even in its ever-expanding lineup of model variants.

Still, i8 demand globally is expected to outstrip supply of the swoopy plug-in hybrid for at least the next year or so.

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