Looking at how the report gets created https://www.numbeo.com/crime/indices_explained.jsp https://www.numbeo.com/crime/indices_explained.jsp "is based on survey

Looking at how the report gets created https://www.numbeo.com/crime/indices_explained.jsp https://www.numbeo.com/crime/indices_explained.jsp "is based on surveys from visitors of this website". No indication how many people took part.