The word 'profession' and the data are both leading you astray. In 2010, the percentage of workers belonging to a union in the United States (or total labor union "density") was 11.4%, compared to 18.6% in Germany, 27.5% (Historically,"professions" were medecine, law, and accountaincy etc...as opposed to the "trades" It was only the trades which had unions. US, we have public sector unions (very large), including teachers, etc. Public sector = "Bureaucrats"!= professions.