response: A little more than 10%, or about 33 million Americans, say they have Irish ancestry, as of 2013.
original_response: Could be.  Had something to do with the great potato famine which caused the immigration which resulted in 33 million americans reporting Irish ancestry in 2013.
history: I love Ireland! My husband and I went there on our Honeymoon! We flew into the Shannon Airport, it was so easy! How neat! Ireland is found in the North Atlantic, did you know that? Yeah, the island is two different countries. There's actually a proposition called United Ireland to make the whole island a single sovereign state. Oh, interesting. I know a lot of Irish made it to America over the years.
knowledge: About 33 million Americans—10.5% of the total population—reported Irish ancestry in the 2013 American Community Survey conducted by the U.S. Census Bureau.