I created a Google Spreadsheet with the data, and the pre/post-tax percentages: http://spreadsheets.google.com/pub?key=p-dY8J8J_WREnyO8P_QLqBQ http://spreadshe

I created a Google Spreadsheet with the data, and the pre/post-tax percentages: http://spreadsheets.google.com/pub?key=p-dY8J8J_WREnyO8P_QLqBQ http://spreadsheets.google.com/pub?key=p-dY8J8J_WREnyO8P_QLq... Interesting point: the lowest fifth use 60% of their post-tax income for housing. Add in food, and you're up to 95%. Add together the trio of "food, shelter and clothing" and you're over their income.