A metric used in NBA basketball that is similar to Field Goal Percentage, but adds an additional parameter.
2. (Government, Politics & Diplomacy) politics. a. the middle of a term of office, esp of a presidential term, when congressional and local elections are held. b. (as modifier): midterm elections.
Congressional elections have way lower turnout compared to presidential elections. According to TIME magazine (and multiple other sources), the voter turnout of the midterm elections in 2014 was as low as 1942. When America was busy fighting in WWII. Only 36.4% of eligible voters voted (down from 40.9% in 2010).