Complex sentence: The Norwegian plug-in electric vehicle market share of new car sales is the highest in the world, the segment's market share rose from 1.6% in 2011, to 3.1% in 2012, and reached 5.6% in 2013.
Split into simpler sentences: The Norwegian plug-in electric car market share of new car sales is the highest in the world. The segment's market share rose from 1.6% in 2011, to 3.1% in 2012, and reached 5.6% in 2013.