The next time you’re out shopping, consider the possibility that your car’s lock may not work or is inoperable.

A report from the National Highway Traffic Safety Administration (NHTSA) on Monday said a large percentage of cars in the United States have locks that aren’t properly maintained.

The report noted that the number of cars that were affected has increased significantly since 2011, when the number began to increase significantly.

“In 2011, the number was 2.8 million cars, in 2013, it was 8.1 million,” NHTSA’s Mark DeFrancesco said in a press release.

“In 2014, it increased to 15.7 million, in 2015, it rose to 18.4 million, and in 2016, it’s been growing.”

The report found that while the number is trending downward, cars are still being repaired and replaced.

“The most common repair and replacement for locks that are inoperably fixed is to replace the lock,” the report states.

NHTPA said the number has been increasing in 2016.

However, NHTPA also noted that in some cases, there may be no replacement lock available.

In addition, NHPAs report found a significant number of locks that were not properly maintained, including older models that are prone to rusting.

According to the report, the National Automobile Dealers Association, the industry trade group, estimates that the average cost for a new lock is around $2,000, which includes labor, tools, and parts.

The NHTTA reported that there were a total of 541,000 locks that had not been inspected or repaired.

Additionally, the NHTAA reported that some of the locks that weren’t inspected were more than 1,000 years old.

For more on the NHEAP report, visit the NHC’s website.