I'm very sceptical about your minimum wage data, I think it might be quite old. First of all, Norway should be on that list. We acctually dont have minimum wage, but a fair salary comparison is gas station and mcdonalds workers. They have from 17$ - 25$ per hour, dependant on their age. 16-18 years get about 17-19$. Also this wikipedia site(I know, dont trust completly on wikipedia): https://en.wikipedia.org/wiki/List_of_minimum_wages_by_country shows that minimum wage in Australia is much higher than what you have posted here.

Here is another article backing up my claims: http://www.abc.net.au/news/2016-05-31/minimum-wage-how-does-australia-compare/7461794

I would like to know your sources for these minimum wage datas