I don't know why you get so butthurt by me asking for clarification. I think you'd also be butthurt if I had assumed you were talking about registered voters and started the discussion there.
I'm not sure exactly what your point is. Yeah, according to
http://www.electproject.org/home/voter-turnout the turnout of all voting age population in 2016 was 54.7%. It was 53.6% in 2012 and 56.9% in 2008.
I wouldn't draw much of a conclusion about the 2012 number, at least not as it relates to Obama, considering he received more 3 million more votes in 2012 than Trump did in 2016.