A sortable table displays population proportions by age group for each U.S. state, with each cell rendered as a horizontal bar whose width corresponds to the percentage of the state's total. Clicking a column header sorts the rows in descending order by that age group's share. The visualization uses D3 v3 to load CSV data, bind the table structure, and draw the bars as SVG rectangles, with hovering highlighting a row in brown. The included state.csv provides the underlying census data.