Chapter 2 - Set Theory - 2.1 Basic Set Concepts - Exercise Set 2.1 - Page 59: 106

{New Zealand, Australia, Unites States}

In the graph, New Zealand, Australia and United States are having used marijuana more than 9% New Zealand = 22.2% Australia = 18% United States = 12.3% So, {New Zealand, Australia, Unites states}