Yes, Percentage wise as it seems like it is around 6% based on the link below.
However I am not sure if the percentage of gas would matter. Even if the usage is high or low the meter is require in a household, camper van, etc. Not sure if a single meter can be used for cooking and heating. Or if there’s different supply for for both heating and cooking.
However given the limited research i did it seems like it is being widely used.
Energy consumption in households – Statistics Explained
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