I couldn't quite figure out how 'up' was used in the below sentence.
"In 2017, more than eight in ten U.S. adults got news on a mobile device, up each recorded year from 2013."
Mainly I want to know how the grammar structure in this works.
would this be 'relative pronoun + be deletion' (then, what is the antecedent?) If not, can this fall into 'dangling participle structure' (then, what is the deleted subject?)
Regardless of the ideas, I would love to hear what you have to say.