Of all the total new vehicle sold in Norway since 2011 28% are PEVs(Plugin Electric Vehicle), because there are so many incentives for owning a PEV in Norway.
Norway has added the world’s largest DC fast-charging station to its achievements, up there with being the largest global market for plug-in electrified vehicles as a share of new vehicle sales. A fast-charging site capable of charging 28 electric cars opened Thursday in Nebbenes, a rural town about 40 miles from Oslo. The charging station hosts all three of the DC fast charging systems available on the global market – CHAdeMO, Combined Charging Standard (CCS), and Supercharger. Norway prides itself on being the strongest global PEV market. In a comparison of total new vehicle sales since the launch of the Nissan Leaf and Chevy Volt, Norway has dominated sales. From 2011 through June 2016, Norway had 28.4 percent of its new vehicle sales made up of PEVs, followed by California at three percent and the U.S. market at 0.75 percent, according to HybridCars.com.
http://www.hybridcars.com/norway-opens-worlds-largest-and-most-diverse-dc-fast-charging-station/ The linked article states: "free public charging", DC fast-charging(CHAdeMO and Combined Charging Standard (CCS)) is free too ? Supercharger is free for Tesla vehicles(Model S and Model X), not sure about Model 3 when it comes to Norway sometime in 2019(?) or later.
While Norway’s transport ministry has backed away from banning all fossil-fuel vehicles, the government is still committed to growing PEV sales. PEV drivers pay no road tax, registration fee, sales tax, or value-added tax. Electric car drivers can also tap into free public parking, free public charging, free ferry transport, and are exempt from tolls on roads, bridges, and tunnels. Finding more DC fast charging stations should also help boost enthusiasm for PEV ownership.