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It would be misleading if sales peaked in 2018, then fell, and have subsequently surpassed the 2018 peak. That's not what happened though. And reporting "sales have peaked" 6 years after the peak is reasonable - doing so 2 years after the peak would be premature.

I still support adding it to the title, because it's even more impressive.

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The timeframe is even more important due to the macro environment of the past six years - one might have credibly suggested 2019 was a fluke and that 2020-2021 was obviously a major outlier on many fronts, but the trend keeps going into the latest years they have data for, which combined with the increase in EV sales makes 2018 as Peak Internal Combustion pretty much irrefutable from the vantage point of early 2025.

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