Assertion: camera's number | /r/CapableOf | double over that period
Facets:
value: more than
type: OTHER
Source sentences:
text: Although information is still being collected by a number of government and private organizations, a NHTSA study using data from 2008 to 2011 showed that even though the number of vehicles with backup cameras more than doubled over that period, the number of injuries was reduced by less than 8 percent.