Hybrid market share has more than doubled since 2017, from 2.0% of the market to 5.1% of the market, according to data from the automotive website Edmunds.com. But that’s not true for all hybrid vehicles, said Edmunds.com analyst Ivan Drury. It’s impossible to know exactly how many hybrid trucks, cars and SUVs are sold because they’re only counted as hybrids in industry statistics when the manufacturer calls it a hybrid itself, or gives it a separate model name, Drury said. Often, car manufacturers don’t specifically mention hybrid systems, any more than any other engine or transmission function. That means a Toyota Rav4 Hybrid might count and a Toyota Tundra i-Force Max pickup, which is also a hybrid, might not.