What's wrong with it? First, there's too much information to digest in too little time. Your brain takes about 3 seconds to gather in the data and if it's not apparent in that time, you will shut down. Sure, the chart is clearly labeled and each line has its own color, but the three second test shows that it's a jumble. It takes a long time to get oriented to what's happening.
Finally, there's no emotion. Communication is, partly, about sharing data, but that data is carried in emotional word and images. What emotion do you want your chart to evoke? If it's boredom, go with the first chart. But if you want to inspire, frighten, encourage or reprimand people with your data, there needs to be a clear, emotional punch to your data. The second chart has a clear statement of what the data shows and then it has a quote explaining what's happening.
- Remove clutter, a cleaner chart is easier to digest quickly.
- Highlight your point visually, if other data should be ignored, remove it or fade it into the background.
- Use different methods for visualizing data, steer clear of the line, bar and pie charts when possible.
Check out a masterful presentation of data by Hans Rosling on CNN.