Oxygen serves as the final electron acceptor during aerobic respiration.
That demand should be little surprise given the leagueâs recent success. In 2011, average MLS attendance hit 17,872 to surpass both the NBA and NHL, and it has since increased to 18,611 fans per game. More impressively, the average franchise is now worth $103 million, up more than 175% over the last five years.
The MLS pays referees a fee for every game based on their experience. There are four experience levels. Level four referees, who have zero to 20 games of experience, received $700 per game, as of 2011. Level three referees, who have 21 to 40 games of experience, received $900.