• Scroll down the query result and take a look at the results for Albania from your previous query. Does something seem off to you?
  • The trouble with doing your last join on c.code = e.code and not also including year is that e.g. the 2010 value for fertility_rate is also paired with the 2015 value for unemployment_rate.
  • Fix your previous query: in your last ON clause, use AND to add an additional joining condition. In addition to joining on code in c and e, also join on year in e and p.