During the 39 UFC events in 2018, a total of 474 fights took place, a number that’s held held rather steady since 2014. The highest live attendance was seen at UFC 193 on November 14th 2015, featuring Ronda Rousey versus Holly Holm, with a total of 56,214 attendees. UFC 129, Georges St-Pierre versus Jake Shields almost had as many live spectators with 55,724 at the octagon.
The highest all-time earnings directly through UFC fights were those of Conor McGregor at roughly 12 million U.S. dollars, however the majority of his personal income comes from other sources such as bonuses, endorsement deals, or for example his professional boxing match against Floyd Mayweather, for which he received over 75 million U.S. dollars. The earnings of fights depend heavily on the style card they fight. For example in UFC 227 Demetrious Johnson, who was fighting in main card, had the highest earning for that event with 470 thousand U.S. dollars.