Fair share - Tradução em português

Fair share - Tradução em português
Qual é a tradução de "Fair share" em português?

Contexto:
"Sex tourism has become the scourge of the 21st century as a result of increased and cheap world travel, and Australia has its fair share of sex tourists."

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Fair share = Uma quantia considerável / O suficiente (no sentido de bastante) / A cota necessária (suficiente) / etc.

I've had my fair share of disappointments this month = I have had enough disappointments this month. Any more than this would be exceeding my fair share of disappointments, or, put differently, the amount of disappointments that I can bear.

He's done his fair share of work = He doesn't have to do any more work. He's done enough, or more than he's been asked to.

Australia has its fair share of sex tourists = Australia has high enough sex tourism rates. It's bad as it is and it doesn't need to get any worse than that.