Here's another relevant comparison between Nordic countries and the U.S. Country | Labor union density Sweden | 66.1% Norway | 52.5% Denmark | 67.2%

Here's another relevant comparison between Nordic countries and the U.S. Country | Labor union density Sweden | 66.1% Norway | 52.5% Denmark | 67.2% Finland | 66.4% Iceland | 90.4% U.S.A. | 10.3% Legally mandated minimum wages are needed in the U.S. due to the lack of strong unions.