We present a descriptive analysis of the results of Mexico's 2009 Economic Census regarding the use of bank credit and accounts by productive entities (companies). INEGI was requested to prepare a set of statistics regarding various company characteristics that are relevant to the decisions made by institutions offering banking services. Information was grouped according to company size and to different business segments we defined based on their access to credit and/or use of banking services. This enabled to establish the size of the markets for bank credit and bank accounts, as well as to identify the phenomena of "voluntary rationing" and "involuntary rationing" (Stiglitz and Weiss 1981). Potential markets for 2008 are 1.5 million companies for bank credit and of 1.1 million companies for bank accounts. Involuntary rationing mostly impacts smaller companies and is more pronounced in the context of the use of bank accounts than in that of credit.