Using GISTEMP, annual average only, 62.9% of ALL years are in the top 10. There is nothing unusual at all about having most of the last years in the top 10. We are in a pretty good run, with 18 of the last years in the top 10. The next longest streak was 12 years from 1934 to 1945. 14.4% of ALL years (of 132) were ranked as #1. When in an overall uptrend, it would (obviously) not be uncommon for most of the most recent data to be near the top. I notice the same thing when I drive. I’m almost always closer to the destination the longer I drive 🙂 The likelihood depends on the slope and the underlying variation.
GISTemp Annual Rank & Run Analysis