The 2nd rank for the Netherlands is pretty astonishing, even for a Dutchman like me. Of course comparing countries like this is bound to be inaccurate; numbers of medieval floods might've been exaggerated or downplayed. Still, the sheer devastation of some of the floods of centuries ago are hard to imagine nowadays. Everyone here knows about the flood of 1953 (2500 deaths, 1800 of them in the Netherlands) but the Sint Felix-flood of 1530 might've killed over 100,000 people.
I am really surprised how low it is for Bangladesh. Given that you have a nation for which most of the land is practically at/below sea level along with a population of 150 million people living in an area the size of Georgia along with virtually no infrastructure to deal with flood control, and which is also known for typhoons, I would expect it to be way higher.