North Dakota population: 762,062
South Dakota population: 884,659
Wyoming population: 578,759
Idaho population: 1,787,065
Montana population: 1,068,778
Total population of these 5 states: 5, 081, 323.
Percentage of US population (328,239,523): 1.54%.
Percentage of US Senate: 10%.
Why do 5 states with 1.5% of the population control 10% of the US Senate?