That graph is awful. I'm not even sure that your conclusion is a valid one. Whoever made that graph should be beaten to death with the collected works of Edward Tufte.
What's bad about it? It has a fairly low "information density" (because it's a boring time series) but there's no other real sins I can think of. It's the authors of pretty (but useless) infographics who generally need to be beaten to death with the collected works of Edward Tufte.
That doesn't make it a bad graph. In fact, putting lots of white space at the top and bottom to make 2% look small would make it a bad (misleading) graph and obfuscate any detail in the line. It's a graph representative of the data. Could have done with a better colourscheme, perhpas.
