15. 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 22.8% and 25.7% of our rental and other property income for the three months ended March 31, 2015 and 2014, respectively. At March 31, 2015 and December 31, 2014, $6,625,000 and $7,168,000, respectively, was due from Governmental Tenants (see Note 14).

Geographical Concentrations of Investments in Real Estate—As of March 31, 2015 and December 31, 2014, we owned 21 office properties, five multifamily properties, and three hotel properties, located in four states and Washington, D.C.

Our revenues concentrations from properties for the periods ended March 31, 2015 and 2014, are as follows:

	March 31,
	2015			2014
California		62.5	%		60.2	%
Washington, D.C.		23.8			24.7
Texas		7.5			7.7
North Carolina		4.6			5.3
New York		1.6			2.1

		100.0	%		100.0	%

Our real estate investments concentration from properties as of March 31, 2015 and December 31, 2014, are as follows:

	March 31, 2015			December 31, 2014
California		52.4	%		52.3	%
Washington, D.C.		31.2			31.2
Texas		7.4			7.4
North Carolina		5.4			5.5
New York		3.6			3.6

		100.0	%		100.0	%