Revenues for contract commercial and residential cleaning services in the U.S. are forecast to rise 4.5% annually to $66.8 billion by 2013, according to a new report from Freedonia Group. The Cleveland-based industry research firm says gains will be driven by ongoing increases in both the number of households and the number of business establishments, coupled with growing availability and affordability of cleaning services. The recession that began in late 2007 and persisted through 200...