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 19.5% and 20.1% of our rental and other property income for the three months ended March 31, 2017 and 2016, respectively. At March 31, 2017 and December 31, 2016, $8,640,000 and $8,339,000, respectively, was due from Governmental Tenants (Note 17).

Geographical Concentrations of Investments in Real Estate—As of March 31, 2017 and December 31, 2016, we owned 19 and 20 office properties, respectively, five multifamily properties, one and two 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 March 31,
	2017		2016
California	63.2	%	64.6	%
Washington, D.C.	20.8		21.2
Texas	7.8		8.0
North Carolina	6.2		4.3
New York	2.0		1.9
	100.0	%	100.0	%

Our real estate investments concentrations from properties are as follows:



	March 31, 2017		December 31, 2016
California	47.6	%	50.8	%
Washington, D.C.	34.5		32.3
Texas	8.1		7.7
North Carolina	5.8		5.5
New York	4.0		3.7
	100.0	%	100.0	%