Revenue for commercial and residential cleaning services is projected to advance 5.5% a year through 2009, reaching more than $60 billion, according to “Commercial & Residential Cleaning Services,” a new study from The Freedonia Group, Inc., a Cleveland-based industrial market research firm. According to the report, growth will be driven by the continuing trend toward outsourcing noncore activities among businesses and by the growing number of consumers who have neither the time nor the i...