CONCENTRATIONS

Tenant Revenue Concentrations—Rental revenue, excluding tenant reimbursements of certain costs, from the U.S. General Services Administration and other government agencies (collectively, "Governmental Tenants"), which primarily occupy properties located in Washington, D.C., accounted for approximately 20.6% and 23.1% of our rental and other property income for the three months ended September 30, 2016 and 2015, respectively, and 19.9% and 22.9% for the nine months ended September 30, 2016 and 2015, respectively. At September 30, 2016 and December 31, 2015, $7,050,000 and $7,968,000, respectively, was due from Governmental Tenants (see Note 16).

Geographical Concentrations of Investments in Real Estate—As of September 30, 2016 and December 31, 2015, we owned 20 office properties, five multifamily properties, one and three hotel properties, respectively, three parking garages, and two development sites, one of which is being used as a parking lot. These properties are located in four states and Washington, D.C.

Our revenue concentrations from properties are as follows:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
California	61.7	%	62.4	%	63.9	%	62.6	%
Washington, D.C.	21.9		24.0		21.2		24.1
Texas	8.6		8.0		8.2		7.8
North Carolina	5.9		4.6		4.8		4.6
New York	1.9		1.0		1.9		0.9
	100.0	%	100.0	%	100.0	%	100.0	%

Our real estate investments concentrations from properties are as follows:



	September 30, 2016		December 31, 2015
California	50.8	%	52.6	%
Washington, D.C.	32.3		31.1
Texas	7.7		7.4
North Carolina	5.5		5.3
New York	3.7		3.6
	100.0	%	100.0	%