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"fastest pace in 15 years in January",

This is year on year data, so its being compared to Januaries in previous years not every month in previous years.

But there are have been multiple February CNYs in the last 15 years, I'm pretty sure of it.

you’re correct. 9 of the last 15 years: 2022, 21, 19, 18, 16, 15, 13, 11, 10.