According to a new report from Sandvine, YouTube and Facebook account for roughly one third of mobile traffic in North America during peak periods.
HTTP, the protocol used for simple web browsing, is ranked third, accounting for 12.6% of mobile traffic.
The Top 10 are comprised of many popular apps/services and account for a combined total of 77%. The remaining 23% percent are accounted for the huge long tail of mobile apps available.
You will find more statistics at Statista