Degressive proportionality

Degressive or progressive proportionality is an approach to the allocation (between parties, regions, states, or other subdivisions) of seats in a legislature or other decision-making body.

Each German state has three to six seats in the Bundesrat of Germany depending on its population.

Treaty negotiations, rather than a specific formula, determine the apportionment between member states.

Any system that reserves a minimum number of seats for a sub-body is to some extent degressively proportional.

Like the US Electoral College, Spain's Congress of Deputies adds two extra seats to the otherwise proportional number allocated to each province.

Number of seats in EP 2014–2019 versus number of inhabitants, showing difference with proportionality.
State population per U.S. electoral college vote for the 50 states and Washington D.C., based on 2010 census. States are ordered from left to right according to total state population.