21. Netherlands
> Known serial killers: 13
> Share of world’s known serial killers: 0.2%
> Share of world’s population: 0.2%
> Total population, 2021: 17,533,044
20. Turkey
> Known serial killers: 14
> Share of world’s known serial killers: 0.3%
> Share of world’s population: 1.1%
> Total population, 2021: 84,775,404
19. Scotland
> Known serial killers: 14
> Share of world’s known serial killers: 0.3%
> Share of world’s population: 0.1%
> Total population, 2021: 5,479,900
18. Poland
> Known serial killers: 15
> Share of world’s known serial killers: 0.3%
> Share of world’s population: 0.5%
> Total population, 2021: 37,747,124
17. Spain
> Known serial killers: 19
> Share of world’s known serial killers: 0.4%
> Share of world’s population: 0.6%
> Total population, 2021: 47,415,750
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