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 19.9%, 22.7% and 24.7% of our rental and other property income for the years ended December 31, 2016, 2015 and 2014, respectively. At December 31, 2016 and 2015, $8,339,000 and $7,968,000, respectively, was due from Governmental Tenants (Note 18).

Geographical Concentrations of Investments in Real Estate—As of December 31, 2016, 2015 and 2014, we owned 20, 20 and 21 office properties, respectively, five multifamily properties, one, three and three hotel properties, respectively, three parking garages, and two, two and one development sites, respectively. The development site that was purchased in August 2015 is being used as a parking lot (Note 4). These properties are located in four states and Washington, D.C.

Our revenue concentrations from properties are as follows:



	Year Ended December 31,
	2016		2015		2014
California	63.4	%	62.2	%	60.4	%
Washington, D.C.	21.3		24.2		24.7
Texas	8.2		7.8		7.7
North Carolina	5.2		4.6		5.1
New York	1.9		1.2		2.1
	100.0	%	100.0	%	100.0	%

Our real estate investments concentrations from properties are as follows:



	December 31,
	2016		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	%