You can very probably obtain a much different result and most likely more accurate by doing this:
Looking at a few metrics should be enough for you to understand that this article from The Economist is some kind of "everything is going well"-centrist-propaganda.
All of the above are criticizable indices, by themselves. However, if you take the time to superpose those statistical markers, you'll get a much better picture than whatever The Economist is trying to say in this article