See

Seasons
	1	2	3
1	8.1	8.1	7.6
2	7.8	7.9	7.5
3	8.6	7.6	7.4
4	7.9	7.0	7.3
5	7.9	7.1	7.7
6	7.6	7.4	7.8
7	7.7	8.2	7.7
8	8.1	8.7	7.9

Source ratings: IMDB (https://www.imdb.com/interfaces/)
Source images: The Movie Database (https://www.themoviedb.org/)