I would go with the lower 7% estimate today. The last major traffic sink in Internet history was ASCII email-spam, Internet oldsters of every gender pummeled w

I would go with the lower 7% estimate today. The last major traffic sink in Internet history was ASCII email-spam, Internet oldsters of every gender pummeled with penis enhancement devices and 411 traffic. It was discussed a lot on the NANOG mailing list 1995-2005 and major portions of IPv4 space were NOT partitioned very well between customer ISP space and their server farms... so from international sources you could expect valid email to come from any address. The other 'spam' of the time was ICMP traffic. Nets were so flaky in those days everyone who could write a script was running pings to what remote servers they had. Many were idiots that didn't even realize you can send small pings with no padded payloads. And of course there were ICMP reflection attacks from bad actors with incredible payloads and address spoofing. So one number I remember is that combined spam-email and ICMP demanded 50% of bandwidth at times. But remember, at the time the principal use of the net was to move ASCII and ASCII-compressed content. While the botspam of today probably exceeds any historical levels, the percentage is low because bots do not watch or serve video. The botspam is spoofing humans on websites and port probing for automated exploit.