Programming Insider has released the Sub-demographic ratings for American Nightmare
Entire Chart here
Supernatural
Number of Affiliates airing the show - 246
Percent Coverage in U.S. - 91
Household - 1.1 Share - 2
Total Viewers - 1805
Adults 18-34 - 0.5 Share 2
Adults 18-49 - 0.7 Share 2
Adults 25-54 - 0.8 Share 2
 
Sub-Demographic breakdowns
Supernatural” (CW)
Women 18-34: 0.6 Share 2
Men 18-34: 0.5 Share 2
Women 18-49: 0.7 Share 2
Men 18-49: 0.6 Share 2
 
Live +3 Data from comment by SonoftheBronx.
 
Supernatural
18-49 -
Live + SD - 0.69 
Live +3D - 1.05
 

Total Viewers -
Live +SD - 1.805
Live +3D - 2.623
 
This is unusual. I have not seen coverage of the sub-demographics or the entire Live +3 Data published before. I don't know if they wil ever show up again. Enjoy!