Rules in Denmark are like the ones in Finland (#24), but wages are generally high. The lowest wage for an adult, that I could find, is for a cleaning woman with no experience, and working without fixed targets for a days work - she gets 16$. If she´s working with a fixed target (she MUST manage so and so during the day) her starting wage is just over 20$/hour, before taxes are paid. After taxes that would be 14-15$.
For under 18 I think it´s 10-11$ before taxes.
An average job like mine (a teacher) is around 32 $/hour. (Calculated as 37 hours per week, 52 weeks per year). That´s 20$/hour after taxes are paid.