Demand, page-15

And speaking of tipping points, Norway appears to have passed that point already thanks to heavy incentives. Look how fast the market has responded.
- In 2016, 30% of sales were EVs - up from 6% just 3 years earlier.
- Meanwhile, diesel falls from 76% to 32%.
http://ev-sales.blogspot.com/2017/01/norway-december-2015.html

Interesting discussion about the role of incentives in these tweets but incentives won't be necessary when the sticker price of an EV falls below that of an ICE