Let me see your calculations then.I didn't not assumed, i specifically calculated with out it. Also to show how little of an increase has happend so far in our lifetime.
What this people do, is just want for you to be scared. They put this false prediction oh how it will be in 2100 just to scare you. But what they don't tell you is that our rapid increase in technology development will solve this problem in the future.
This whole Climate Changes/ Sea level rise is not science anymore it's a cult, and just like in every other cult, they scare you with their false prophecies of doom. And they will keep on doing it, until you are scared and become easy to fall under their control. But in reality there is nothing to fear!