https://en.wikipedia.org/wiki/Collective_agreement_coverage
France, Austria, Belgium, Iceland, and Sweden all have above 90% collective bargaining coverage. Finland, Denmark, Italy, Netherlands, Norway, Australia, Luxembourg, Switzerland, and Germany are between 50% and 90%.
https://en.wikipedia.org/wiki/Collective_agreement_coverage
France, Austria, Belgium, Iceland, and Sweden all have above 90% collective bargaining coverage. Finland, Denmark, Italy, Netherlands, Norway, Australia, Luxembourg, Switzerland, and Germany are between 50% and 90%.