U.S. & Canada fixed 2016 +22%, 2020 +15%. The 2016 growth in U.S. & Canada mobile data looks to be 49%; the 2020 prediction is 38%. The VNI sees a major slowdown in both fixed and wireless growth around the world. Cisco estimates 2016 worldwide mobile growth to be 68%. They expect that to fall to 41% in 2020 when most people will have smartphones. Remember the world turns so no five-year forecast is certain.
Check the chart below and extremely rich data here and here. There's so much information I could spend a week in the analysis and still not catch all the inferences. Accuracy can't be perfect but they are clearly the best in the business.
The 100% mobile growth was an artifact, driven by people first getting smartphones. The average smartphone user is increasing data usage ~40%/year, per AT&T.