International internet traffic grew 53 percent between mid-2007 and mid-2008, down from 61 percent the preceding year.
For the second consecutive year, total international internet capacity grew faster than total internet traffic, leading to lower utilisation levels on many internet backbones, according to market tracker TeleGeography.
Between 2007 and 2008, average traffic utilisation levels decreased from 31 percent to 29 percent, while peak utilisation fell from 44 percent to 43 percent, the firm found.
The aggregate trend toward lower utilisation of capacity belies "significant" regional differences, according to TeleGeography. While utilisation on international links to Europe and Asia fell in 2008, they rose in the US, Canada and Latin American, where traffic growth outpaced the deployment of new internet bandwidth, the firm asserts.
Traffic growth between the United States and Latin America surged 112 percent while traffic on internet backbones between major cities in the more mature US market rose 47 percent.
Traffic growth has remained strong, even though the pace of broadband subscriber growth has declined, according to TeleGeography. Broadband subscriber growth has been slowing since 2001, but the volume of traffic generated by each user has grown, the firm states.
Traffic growth is fuelled by consumer demand for video, delivered via web browsers, peer-to-peer services, or streaming protocols, TeleGeography says.