16. CONCENTRATIONS

Tenant Revenue Concentrations—Rental revenues 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 20.1% and 22.8% of our rental and other property income for the three months ended March 31, 2016 and 2015, respectively. At March 31, 2016 and December 31, 2015, $7,531,000 and $7,968,000, respectively, was due from Governmental Tenants (see Note 15).

Geographical Concentrations of Investments in Real Estate—As of March 31, 2016 and December 31, 2015, we owned 20 office properties, five multifamily properties, two 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 March 31,
	2016			2015
California		64.6	%		62.5	%
Washington, D.C.		21.2			23.8
Texas		8.0			7.5
North Carolina		4.3			4.6
New York		1.9			1.6

		100.0	%		100.0	%

Our real estate investments concentrations from properties are as follows:

	March 31, 2016			December 31, 2015
California		51.9	%		52.6	%
Washington, D.C.		31.6			31.1
Texas		7.5			7.4
North Carolina		5.3			5.3
New York		3.7			3.6

		100.0	%		100.0	%