Units, an industry magazine put out by the National Apartment Association, conducted a survey of income and expenses of 937,568 units and found that collected rent revenues are up 3.3% from last year. National net operating incomes are up more than 10% from last year, losses from vacancies, uncollected rents and concessions are the lowest they have been in 5 years. You can find this survey at www.naahq.org/ then click on industry and economic data in the left column. It is a goldmine of information. You need to be a member of NAA.