According to US Census figures from 2000, 41,000,000 Americans claim to be wholly or partly of Irish ancestry, a group that represents more than one in five white Americans. Many African Americans are part of the Irish diaspora, as they are descended from Scots-Irish or Irish slave owners and overseers who arrived in America during the colonial era. The US Census Bureau's data from 2016 reveals that Irish ancestry is one of the most common reported ancestries reported (in the top 3 most common ancestries reported). Even though Irish immigration is extremely small relative to the scope of current migration, Irish ancestry is one of the most common ancestries in the United States because of the events that took place over a century ago.