Pocketbook issues outweigh political and geopolitical developments, the University of Michigan said.
The devices have been linked to 15 fires and 350 burn injury reports.
Since July 4 alone, prosecutors have charged 12 defendants in cases involving more than $90 million.
The NTSB, in a January report, said the collision was caused by systemic failures in FAA airspace design, safety oversight, and risk management.

Recently filed documents provide a look at the prosecution’s bid to establish the suspect’s motive.
China calls the medals a national triumph, but skeptics say the scholars’ overseas research played a key role.
Fiscal rankings are a helpful tool in keeping your elected officials transparent and accountable.

Temporary Part D subsidies will end this year, though experts disagree on how significant the impact will be.
State leaders said public safety, not an attempt to ban guns, is the objective of the new law, which is being challenged by opponents in court.
Chinese leader Xi Jinping is expected to visit Washington on Sept. 24, just weeks before the current trade deal is set to expire.
The ruling adds to the split between circuit courts on the matter.
Personal income and spending slowed as months-long elevated prices weighed on consumers.
The warning followed heavy U.S. strikes on Iran and came amid fresh Iranian missile attacks against Jordan and Kuwait.
The U.S. attacks on Wednesday were a ‘powerful response’ to Iranian attacks on Tuesday on U.S. forces based in the Middle East, CENTCOM said.
Mamdani urged the Trump administration to enforce the ICC warrant, while Netanyahu and Trump rejected that position.
The action was taken because of the possibility of homes and businesses in affected regions losing power, which would pose a public safety risk.
The storms spawned a tornado that caused widespread damage in the Menasha and Appleton areas, according to the governor’s office.
El-Sayed and Stevens each told voters they were the stronger general-election candidate against Republican Mike Rogers at their final debate before Aug. 4.
The U.S. president said he knows what’s going on at Pickaxe Mountain since the United States has advanced cameras monitoring the site.
Earlier this month, Trump announced he was granting Ukraine a license to make Patriot air defense systems.