Credit to Economist.com http://www.economist.com/blogs/graphicdetail/2015/08/daily-chart-5?fsrc=scn%2Ftw%2Fte%2Fdc%2Fst%2Ftheworldsmostliveablecities

The ranking for the best  cities was based on 30 factors spread across five areas: stability, infrastructure, education, health care and environment. 

1. Melbourne - Australia 

2. Vienna - Austria 

3. Vancouver - Canada 

4.Toronto - Canada 

5=. Calgary - Canada 

5=. Adelaide - Australia 

7. Sydney - Australia 

8. Perth - Australia 

9. Auckland - New Zealand 

10=. Helsinki - Finland 

10=. Zurich - Switzerland 

Link: http://www.economist.com/blogs/graphicdetail/2015/08/daily-chart-5?fsrc=scn%2Ftw%2Fte%2Fdc%2Fst%2Ftheworldsmostliveablecities 

Which factors should be included in this ranking? 

Why Canada and Australia dominate the first ten positions?