AD Research Wiki:

User agent %
DotBot/1.1 56.32
DotBot/1.2 32.12
Mozilla/5.0 8.94
SemrushBot/1.2~bl 1.12
BUbiNG 0.54
YandexBot/3.0 0.52
MSIE 7.0 0.06
MSIE 9.0 0.04
PetalBot 0.04
Opera/9.80 0.03
Others 0.27