Sofia, Bulgaria , 2022
Razgrad, Bulgaria , 2022
Sofia, Bulgaria , 2020
Sofia, Bulgaria , 2016
Sofia, Bulgaria , 2015
2015
Paris, France , 2014
Sofia, Bulgaria , 2013
Sofia, Bulgaria , 2011
Sofia, Bulgaria , 2010
Sofia, Bulgaria , 2008
Sofia, Bulgaria , 2005
Sofia, Bulgaria , 2003
Sofia, Bulgaria , 2002
Peshtera, Bulgaria , 2001
Yamal, Russia , 1998