Global Electronic Cigarettes Market Assessment, By Product Type [E-cigars, E-pipes, Others], By Category [Modular, Rechargeable, Disposable], By System Type [Open Vaping System, Closed Vaping System], By Flavor [Original Tobacco, Mint and Menthol, Fruit and Candy, Chocolate, Dessert, Others], By Composition [Nicotine, Non-Nicotine], By Mode of Operation [Automatic, Manual], By Price Range [Value Segment, Premium Segment], By Distribution Channel [Offline, Online] By Region, Opportunities and Forecast, 2017-2031F