This covers all aspects of knife crime including, fatal, non-fatal stabbings etc.
Met Police Data: https://www.met.police.uk/SysSiteAssets/foi-media/metropolitan-police/disclosure_2019/february_2019/information-rights-unit---ethnicity-of-perpetrators-and-victims-of-knife-crime-in-london-from-april-2008-to-november-2018
Percentage Calculator: https://percentagecalculator.net/
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