AD Research Wiki:

User agent %
DotBot/1.1 52.75
DotBot/1.2 33.95
Mozilla/5.0 10.78
SemrushBot/1.2~bl 1.05
BUbiNG 0.51
YandexBot/3.0 0.49
MSIE 7.0 0.06
PetalBot 0.04
MSIE 9.0 0.04
GoogleOther) 0.04
Others 0.29