It's a list made of 50 Eurovision songs according to a percentage of the maximum possible score in the jury vote.
The video includes songs which competed in the finals from 1957 to 2018 excluding 1998-2008 (when only the televoting was used) and 2013 (because of lack of needed data, split average rankings were published instead of split scores). In 1997, five countries used the televoting. Their points were included to represent these countries' vote.
In case of a tie current rules of Eurovision are applied (unless these contestants are from the same year, in which case their placement is the tie-breaker). The one who gets the highest percentage of the countries who awarded points wins. If there is still a tie, it is counted how many sets of maximum points in relation to the number of countries each country received, etc.
All rights belongs to EBU.
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