Measuring WorthThis site includes historical data on economic aggregates from the US, UK, and Australia, and to a lesser extent, Japan and China. The Comparators section provides answers to questions such as what a dollar was worth in 1907. Data Sets provides historic economic information such as the Consumer Price Index, Gross Domestic Product, and S&P Composite Stock Index, along with other growth indexes. The Graphs tool allows available data series to be plotted in a graph.