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ZapMap has a couple of statistics here, but I suppose it's difficult to make a ratio because which stat do you base it on? Devices, connectors?
If we just go on devices, they have about 17k devices at the end of 2019, or about
5.7 cars per device, then end of 2022 is about 37k devices, or about
17 cars per device. This is definitely not the direction we need that ratio heading