These are the 15 countries that have the worst average ranking in the Eurovision Song Contest for the period of 2004-2023. Can you guess them all? The average rank is the average number of placements away from the last place in the contest; so if a country had always come last it would have an average ranking of 0 (because it's 0 places away from the last place).
For detailed information about how the calculations have been done, see this blog entry
Updated for 2024. Switzerland is finally off this list thanks to its victory. I kept Netherlands' average unchanged, but I counted no country as having come in 26th place. (There would've been 26 countries in the final if the Netherlands hadn't been disqualified. So all countries that didn't qualify were obviously worse than 26th.)