The Census Bureau on Thursday issued its most detailed portrait yet of how the U.S. has changed over the past decade, releasing a trove of demographic data that will be used to redraw political maps across an increasingly diverse country.
I think the article is trying to say that it's notable that the white population is declining in total numbers for the first time, not that the percentage of white Americans hasn't declined before.
I think the article is trying to say that it's notable that the white population is declining in total numbers for the first time, not that the percentage of white Americans hasn't declined before.