Trends in bank profitability and factors affecting it are major indicators of changes in the state of health of national banking systems. This publication provides nationally aggregated financial statements of banks data for OECD member countries. The coverage of banks is not the same in each country, though the objective is to include all institutions that conduct ordinary banking business, namely institutions which primarily take deposits from the public at large and provide finance for a wide range of purposes. Some information on the number of reporting banks, their branches and staff is also included, as well as structural information regarding the whole financial sector. Moreover, ratios, based on various items of the financial statements of banks in percentage of some specific aggregates, are supplied to facilitate the analysis of trends in bank profitability of OECD countries. Times series available vary according to country, but generally the last five years of available data are shown.