It's worth mentioning that last year Germany launched a thinly-veiled subsidy campaign for their auto makers which offered a substantial rebate for "environmentally friendly" vehicles (ignoring that keeping your existing car - which conforms to the EU emission regulations - for a few more years is overall better for the environment than buying a new one now) which included plug-in hybrids. Which of course artificially inflates the sales in this category, although we can be confident that some (or most?) of these plug-in hybrids will never actually be recharged.
18%, and share shrank in 2020. Why make stuff up?