That's from Lyman Stone also these:
Do you know what major American ancestry-group is declining faster than any other? Scotch-Irish. The vaunted origin-ancestry of Appalachia lost nearly 2.2 million self-identifiers from the 2009 ACS sample to the 2014 ACS sample, marking a 42% decline. The only ancestries to lose more people were German and English; much of the decline in those two groups was centered around Appalachia.
Want to guess the fastest-growing ancestry group in America? I bet you guessed “Mexican” or “Chinese.” Those are solid guesses; Mexican is #3, at 11% growth with 2.4 million new self-identifiers.
The correct answer, however, is “White/Caucasian.” The number of Americans self-identifying not as English or German or Scotch-Irish but “White” as their ancestry, as distinct from just their race, rose 47% from the 2009 ACS to the 2014 ACS, with 3.9 million new identifiers. The second largest grower was “American” as an ancestry; this is un-hyphenated American, mind you. There are 2.9 million new “Americans,” giving 15% growth.