The average of window stickers from cars, SUVs, vans, and pickup trucks bought last month in the U.S. was 25.3 mpg, and February’s revised value was exactly the same.

This update comes via Dr. Michael Sivak and Brandon Schoettle, director and project manager respectively of the University of Michigan’s department of Sustainable Worldwide Transportation at its Transportation Research Institute.

The researchers monthly report mpg and emissions data and UMTRI have been monitoring the U.S. fleet since October 2007.

So how have the cars and trucks sold in U.S. improved since almost nine years ago?

“Fuel economy is down 0.5 mpg from the peak reached in August 2014, but still up 5.2 mpg since October 2007 (the first month of our monitoring),” said the researchers.

As for emissions, the University of Michigan Eco-Driving Index (EDI) was 0.84 in January 2016, up 0.01 from the revised value for December 2015.

This index estimates average monthly emissions and the lower the value, the better the score.

January’s 0.84 value indicates average new-vehicle drivers produced 16-percent lower emissions than in October 2007.

However, notes the researchers, the peak month of August 2014 was not matched in January 2016 and represents 6 percent higher emissions.

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