Ku qor sii wadida faqradan - Demchenko wuxuu sidoo kale ku guuleystay siddeed billadood tartanka FIL European Luge Championships oo leh afar dahab ah (Ragga keli ah: 2006
, 2010; Kooxda isku dhafan: 2012, 2014), laba dahab ah (Kii ragga ee ragga: 1996, 2008), iyo laba naxaas ah (Ragga labiska: 1996; Kooxda isku dhafan: 2013).