Packet Loss on Fibre Line

[#1]

I have a ping monitor provided by think broadband and what i have noticed is packet loss (2-5%) happening in small amounts throughout the day. They don't necessarily coincide with activity on the line. I do not think this is normal - any ideas on what it could be?
My graphs is here:
http://www.thinkbroadband.com/ping/share/a3d66f9c224e2b03849feca0c9b5de91.html

[#2]

I have 3 ping graphs from 3 separate sources. At one time or the other throughout the day each one will suffer very minor packet loss. Unless it shows on all 3 at the same time I don't worry. It's only a split second packet loss and looks very minor.

[#3]

Fair enough, thank you