The key element of the data that we currently have—and the one element that might give us a means to keep our finger on the pulse of and monitor economic growth—is gross domestic product. Scotland's GDP worries me considerably. Like others, I have looked in detail at the Royal Bank of Scotland's recent report "Wealth Creation in Scotland: A Study of Scotland's Top 100 Companies", from which I managed to get an expansion of gross value added by the top 100 companies.