All data obtained from @SonOfTheBronx on Twitter:
Son Of The Bronx/Programming Insider

June 16th, 2018

Time
Show
Ratings
A18-49
10:30pm Dragon Ball Super 1,098,000 668,000
11:00pm DBZ Kai 923,000 563,000
11:30pm My Hero Academia 720,000 438,000
12:00am Fooly Cooly Progressive 687,000 415,000
12:30am Jojo’s Bizarre Adventure 558,000 353,000
1:00am Hunter X Hunter 532,000 343,000
1:30am Black Clover 491,000 292,000
2:00am Naruto Shippuden 432,000 273,000
2:30am Space Dandy 368,000 210,000
3:00am Cowboy Bebop 369,000 210,000
3:30am Lupin The Third 362,000 217,000

;
comparison

June 17th, 2017

Time
Show
Ratings
A18-49
11:00am Samurai Jack 1,085,000 631,000
11:30am Dragon Ball Super 984,000 569,000
12:00am DBZ Kai 944,000 560,000
12:30am Attack on Titan 776,000 441,000
1:00am Tokyo Ghoul 711,000 413,000
1:30am Hunter X Hunter 650,000 372,000
2:00am Lupin The 3rd 545,000 304,000
2:30am Naruto: Shippuden 588,000 330,000
3:00am Ghost In The Shell 543,000 326,000

If you want more data, you can check my spreadsheet here;. That will have further data including per year difference and A18-49 differences.

Let us know what you think in the comments below about the ratings.