The rate peaked at 8.2% in 2011 as the nation recovered from the wreckage of the 2008-2009 financial crisis and has been dropping ever since.
"There definitely is room for improvement, especially amongst certain segments of the population," said FDIC senior research economist Jeffrey Weinstein.
https://finance.yahoo.com/news/amount-of-unbanked-americans-hits-a-record-low-090019755.html