I don't know how they came up with this sentence. I'm sure it is true in some sense of the word "true." But just look at the data:
https://judithcurry.com/2014/07/07/understanding-adjustments...
Perhaps OP is talking about some older data before the cutoff of this graph.
Edit: the Guardian article posted elsewhere shows the opposite:
https://www.theguardian.com/environment/climate-consensus-97...
Amusingly, the Guardian illustration is credited to the same person who wrote the article I cite: Zeke Hausfather.
Welcome to the world of climate statistics. When bar charts drive trillions of dollars in public policy, they tend to get pretty wonky, pretty fast...