How big is the Internet?

Wed Aug 14 19:00:51 UTC 2013

I should have remembered, NANOG prefers to correct things.  So here are
several estimates about how much IP/Internet traffic is downloaded
in a month.  Does anyone have better numbers, or better souces of
numbers that can be shared?

Arbor/Merit/Michigan Internet Observatory: 9,000 PB/month (2009)
Minnesota Internet Traffic Studies: 7,500-12,000 PB/month (2009)

Cisco Visual Network Index:
 	Total IP: 55,553 PB/month (2013)
 		Fixed IP: 39,295 PB/month (2013)
 		Managed IP: 14,679 PB/month (2013)
 		Mobile Data: 1,578 PB/month (2013)
Telegeography via ITU report: 44,000 PB/month (2012)
National Security Agency: 55,680 PB/month (2013)

Individual providers/countries
Australian Bureau of Statistics (AU only) : 184 PB/month (2012)
AT&T Big Petabyte report (AT&T only): 990 PB/month (2013)
CTIA mobile traffic (US only): 69 PB/month (2011)
London School of Economics (Europe only): 3,600 PB/month (2012)
TATA Communications: 1,600 PB/month (2013)

Historical:
NSFNET: 0.015 PB/month (1994)