Other possible interesting graphs:

  * Family type v. income
  * Number of years in industry v. income
  * Hours per week v. family status
  * Age v. Employment type
  * Level of education v. Employment type
  * Marital status v. Employment type
  * Age v. Hours per week

Age vs. Income as a density plot... the points are too close together to be meaningful.

If you have any visualisation techniques that are surprising or especially revealing I would be very interested both to look at the data and to learn about data visualisation.

Thanks for doing that.

Maybe also: Income vs Education. Income vs Location (maybe aggregated by country, state or city). And basically every other possible combination :)