Internet Traffic
The CEO of Cisco predicts that by 2011, just 20 families will generate more Internet traffic than the entire world did in 1995!
Not sure how much traffic there was in 1995, but I started using the Internet in 1996 and monthly traffic would have been 1 MB or so a month.
Today I use or exceed my 20 GB limit each month, and also my blog generates approx 100 GB a month. So on an annual basis I’m responsible for around 1.5 Terabytes.