Well Eric...Which floor do you live on in this example?

"This graphic shows the distribution of gross annual household income. The building's thirty exposed floors are easily divided into quintiles, each income quintile represented by six floors. Each floor represents the tenth of a third (3.33%) of households in the US, and each section of 10 floors represent roughly one third of American society. The floors above the top black line represent those households with incomes of or exceeding $100,000. The floors below the bottom black line, however, represent those households who fell below the poverty threshold. In order to live on the top floor of the American income strata, a household's annual gross income needs to exceed $200,000."