It is great to offer free childcare to all citizens, but if those childcare facilities are inadequately resourced the quality of care will decline.
It looks like it's 1:6 until kids are 27 months, at which point the ratio becomes 1:10. When kids are 3-4 the ratio is 1:12, and when they're 5 and up, the ratio is 1:15. These are numbers from 2011, so not sure how that's changed over time.