So where did this 7% number come from? Another way to look at that is one parent brings in 100% of their income, and when the second parent wants to get a job

So where did this 7% number come from? Another way to look at that is one parent brings in 100% of their income, and when the second parent wants to get a job they have to sacrifice 14% of their pay to get childcare while they're away. That seems low to me. Another way to analyze this is to look at how many children a single worker has to take care of to hit the same pay. If childcare for 2 kids is 14% of a salary, and salary is half the cost of running a daycare, then you need 29 kids per childcare employee?? How is that supposed to work? Edit: And yes I'm aware subsidies can exist but this hits an area where the subsidies are so high that the 7% number still needs explanation.