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

June 2nd, 2018

Time
Show
Ratings
A18-49
10:30pm Dragon Ball Super 1,073,000 640,000
11:00pm DBZ Kai 845,000 518,000
11:30pm My Hero Academia 608,000 370,000
12:00am Fooly Cooly Progressive 580,000 372,000
12:30am Jojo’s Bizarre Adventure 480,000 273,000
1:00am Hunter X Hunter 492,000 275,000
1:30am Black Clover 471,000 259,000
2:00am Naruto Shippuden 439,000 230,000
2:30am Space Dandy 391,000 199,000
3:00am Cowboy Bebop 352,000 193,000
3:30am Lupin The Third 368,000 208,000

;
comparison

June 3rd, 2017

Time
Show
Ratings
A18-49
11:00am Samurai Jack 909,000 516,000
11:30am Dragon Ball Super 839,000 492,000
12:00am DBZ Kai 853,000 517,000
12:30am Attack on Titan 656,000 402,000
1:00am Tokyo Ghoul 553,000 353,000
1:30am Hunter X Hunter 474,000 316,000
2:00am Gundam Unicorn 430,000 290,000
2:30am Naruto: Shippuden 438,000 309,000
3:00am Ghost In The Shell 380,000 260,000

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.