Plug-in Hybrid Electric Vehicles (PHEV) Market Size & Share, By Power Source (Stored Electricity, On-board Electric Generator), Powertrain (Series Hybrid, Parallel Hybrid, Combined Hybrid), Vehicle Type (Passenger Cars, Commercial Vehicles, Two Wheelers, Others) - Growth Trends, Regional Insights (U.S., Japan, South Korea, UK, Germany), Competitive Positioning, Global Forecast Report 2025-2034