I have yearly data for the import of fish products to Portugal (years 2000 to 2011) per country. There are some trends that I would like to visualize, for example some countries drop out and enter in the top 5 as exporters.
Now I'm not really sure how I can do it in a non-confusing way that highlights the changes but does not miscommunicate the statistics and is clean. IMO in the line chart (apart from having too much content) changes are more apparent than, for example, in pie charts (only two datasets shown). But is it correct to visualize aggregated data in line charts (or may I falsely communicate that the data is connected)?