How many Americans believe in angels?

Was curious, so I went looking. Search engines memory-hole the Internet pretty quickly these days, so it was difficult to dig up much, but I figure it's around 5/7 of the population and that it's been pretty consistent for the last few decades.

Year	Poll		Pollster
1978	54%		Gallup
1994	72%		Gallup
1996	72%		Gallup
2001	79%		Gallup
2001	77%		Scripps
2004	78%		Gallup
2006	81%		AP-AOL
2007	75%		Gallup
2007	68%		Pew
2005–7	61%	(21% "probably")	Baylor
2011	77%		AP-GfK
2014	77%		AP-GfK
2016	72%		Gallup