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A total of 45 clubs have graced the Slovenian top-flight football league, the PrvaLiga, since its inaugural season in 1991–92. The league consists of 10 teams competing in a double round-robin format, with the top-placed club crowned as champions and the bottom-placed team relegated to the second division. NK Maribor is the most successful club in the PrvaLiga, having won the title 15 times.