Moin,
ich habe aus einem Datenexport in Excel folgende Datenstruktur:
{"birthyear":2001,"zipcode":"69123","city":"Heidelberg","income":3000},{"birthyear":1994,"zipcode":"10318","city":"berlin"},{"birthyear":1986,"zipcode":"12203","city":"Berlin"},{"birthyear":1997,"zipcode":"12109","ci...