Kevin Drum posts this chart with a straight face as "proof" that sea level rise is out-pacing forecasts.
I don't really think I need to even point out the problem to most of my readers, but you can see the differences in ending value is because the starting values are different. Likely the two are drawing from different data sources with a shifted zero value. The slopes are the same, confirmed by the fact that the 3.2 mm trend per year is well within the IPCC forecast range that was centered, if I remember right, around 3.3 mm per year. It is also well under Al Gore's forecast, which was for 20 feet by 2100, or about 61 mm per year.