ESNET Notes ESnet, the Energy Sciences Network, has the longest consistent set of measurements that has been found so far, going back to 1990. It shows a compound annual growth rate of 85%.

The numerical data is available below.

Traffic accepted by ESNET in June of each year
Year	TB
1990	0.079
1991	0.187
1992	0.437
1993	0.628
1994	1.72
1995	2.82
1996	2.81
1997	4.61
1998	8.83
1999	18.8
2000	35.7
2001	43
2002	103
2003	166
2004	282
2005	470
2006	1210
2007	2670