based on truth and (most importantly) all statistics (gdp ppp per capita, unemployment , safety, quality of life rankings etc ) it would be:
Tier 1 : Australia, Norway, Quatar, Switzerland, Netherlands
Tier 2 : USA, Germany, France, UK, Sweden, Finland, Canada, Japan , New Zealand, Austria, Taiwan, Denmark, Belgium, Ireland (may be tier 1)
Tier 3a : Italy, Spain, Israel, South Korea
Tier 3b : Portugal, Poland , Hungary, Czech republic, Slovakia, Lithuania, Estonia, Malaysia, Oman, Croatia, Greece, Chile
Tier 4 : Romania , Russia, Bulgaria, Turkey, Latvia, Thailand, Kazachstan, Saudi Arabia, Argentina
Tier 5 : Mexico, Belarus, Serbia, Bosnia, Montenegro, Macedonia, China (or tier 4), Indonesia, Uruguay,
Tier 6, 7, 8 : I dont want to insult any country. Lul.