Linden Lab Official:Where can I find economic statistics on Second Life?
The Marketplace page of our Second Life website provides information on Second Life's economy and usage. For additional information, please refer to the latest reports:
Economic Statistics and raw data files Provides information on Second Life's economy, including L$ sources and sinks, spending by amount, land sales, estimated business owners, and number of Residents logged in. This link also provides links sortable by date to individual XML and XLS (Excel) files containing economic data on specific topics.
LindeX Market Data: Provides the most recent LindeX market data in both graphical and tabular format.