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

May 19th 2018

Time
Show
Ratings
A18-49
10:30pm Dragon Ball Super 876,000 575,000
11:00pm DBZ Kai 686,000 442,000
11:30pm My Hero Academia 554,000 336,000
12:00am Fooly Cooly 485,000 309,000
12:30am Jojo’s Bizarre Adventure 482,000 312,000
1:00am Hunter X Hunter 480,000 313,000
1:30am Black Clover 440,000 287,000
2:00am Naruto Shippuden 415,000 273,000
2:30am Space Dandy 361,000 242,000
3:00am Cowboy Bebop 333,000 216,000
3:30am Ghost In The Shell 327,000 206,000

;
comparison

May 20th, 2017

Time
Show
Ratings
A18-49
11:00am Samurai Jack 1,485,000 865,000
11:30am Dragon Ball Super 1,147,000 662,000
12:00am DBZ Kai 1,026,000 615,000
12:30am Attack on Titan 833,000 473,000
1:00am Tokyo Ghoul 649,000 383,000
1:30am Hunter X Hunter 583,000 333,000
2:00am Gundam Unicorn 504,000 285,000
2:30am Naruto: Shippuden 482,000 264,000
3:00am Ghost In The Shell 405,000 233,000

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.