Salamun alikum
I collected these data from some reliable sources and just want to share with all of you.
Total number of traditions in 9 volumns of Bukhari: 7068
Aisha the mother of faithful: 1250 (17.68%)
Abu Hurairah: 1100 (15.56%)
Ibn-Umar, son of Umar: 1100 (15.56%)
Anas-Ibn-Malik: 900 (12.73%)
Abdullah-Ibn-Abbas: 700 (9.9%)
Jobair-Ibn-Abdullah: 275 (3.89%)
Abu-Musa-Ashari: 165 (2.33%)
Abu-Said-Al-Khedri: 130 (1.84%)
Ali-Ibn-Abitaleeb: 79 (1.11%)
Umar-Ibn-Khattab: 50 (0.71%)
Umm Salamh: 48 (0.68%)
Abdullah-Ibn-Masud: 45 (0.64%)
Muawiyah-Ibn-Abusofyan: 10 (0.14%)
Hasan-Ibn-Ali: 8 (0.11%)
Ali-Ibn-Husain: 6 (0.08%)
Husain-Ibn-Ali: 2 (0.03%)
---------------------------------------------- (83% on the whole)
wassalam