Here Oricon Manga sales from November 21, 2016 to May 21, 2017.
Top 10 Best Selling Manga Series First Half 2017
1 - One Piece (5,969,851 copies).
2 - Shingeki no Kyojin (3,974,437 copies).
3 - Kingdom (3,244,618 copies).
4 - Haikyû!! (3,086,097 copies).
5 - Tokyo Ghoul:re (2,154,752 copies).
6 - Boku no Hero Academia (2,097,088 copies).
7 - One Punch-Man (1,982,356 copies).
8 - Nanatsu no Taizai (1,881,062 copies).
9 - Detective Conan (1,653,403 copies).
10 - Shokugeki no Souma (1,469,092 copies).
Top 10 Best Selling Manga Volumes First Half 2017
1 - One Piece 84 (2,605,418 copies).
2 - One Piece 85 (2,283,348 copies).
3 - Shingeki no Kyojin 21 (1,576,240 copies).
4 - Shingeki no Kyojin 22 (1,405,736 copies).
5 - Tokyo Ghoul:re 09 (868,244 copies).
6 - Haikyû!! 24 (867,000 copies).
7 - One Punch-Man 12 (848,678 copies).
8 - Haikyû!! 25 (809,898 copies).
9 - Tokyo Ghoul:re 10 (785,881 copies).
10 - Kingdom 45 (782,182 copies).
.
.
.
27 - One Piece 83 (454,624 copies).
https://myanimelist.net/news/50938285
Last year sales: http://www.arlongpark.net/showthread.php?t=44077