He is a victim of poor reporting. The press keeps hearing him make wild exaggerations which he actually never said. (Indeed remarkable how consistent interviewers are with their misinformation over a couple of decades.) It must be a conspiracy against the virtuous James Hansen, who only cares about getting accurate information to the press.
He is talking about 2006.
He is talking about 2001.
I think our best measure is what happened in the past. We know that, for instance, 14,000 years ago sea levels rose by 20m in 400 years – that is five metres in a century. This was towards the end of the last ice age, so there was more ice around. But, on the other hand, temperatures were not warming as fast as today.
He is talking about the decade which just ended.