In the United States, the self-storage market has loyal clients with over 46,000 units in 2009 and over $6.6 billion in gross earnings as of 2007. Customers normally lease the storage space, which can be anything from rooms and containers in big structures to individual areas in outdoor areas, on a short-term basis (i.e., regular monthly) with items saved ranging from small memorabilia to big household home appliances, even safes with valuables inside. Both businesses and individuals lease the storage spaces.