Here is map of the world based on women's income world wide. Looks a little different from the map that we typically see. It is from an impressive website, www.worldmapper.org
"The total income of women is highest in the United States, and second highest in China. Women in the United States have a high total income because on average they are some of the highest paid women in the world. Women in China earn below the world average, but they have high total earnings due to the large population of China."
If you teach Geography or Social Studies then you can find a map on this website for your classes. They have distorted maps based on just about every topic that you can think of. They are great for including in presentations or handouts, so students can make comparisons.
If you like that, then you might want to see my list of other resources for teachers, here. Enjoy!