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 24.7%, 27.5% and 28.4% of our rental and other property income for the years ended December 31, 2014, 2013 and 2012, respectively. At December 31, 2014 and 2013, $7,168,000 and $5,596,000, respectively, was due from Governmental Tenants (see Note 15).

Geographical Concentrations of Investments in Real Estate—As of December 31, 2014, 2013 and 2012 we owned 21, 19 and 19 office properties, respectively, five multifamily properties, and three hotel properties (inclusive of one note receivable at December 31, 2012), located in four states and Washington, D.C.

Our revenues concentrations from properties for the years ended December 31, 2014, 2013 and 2012, is as follows:

	Year Ended December 31,
	2014			2013			2012
California		60.4	%		57.1	%		58.0	%
Washington, D.C.		24.7			26.5			25.8
Texas		7.7			8.1			7.6
North Carolina		5.1			6.1			6.5
New York		2.1			2.2			2.1

		100.0	%		100.0	%		100.0	%

Our real estate investments concentration from properties as of December 31, 2014 and 2013, are as follows:

	December 31,
	2014			2013
California		52.3	%		50.5	%
Washington, D.C.		31.2			32.5
Texas		7.4			7.7
North Carolina		5.5			5.6
New York		3.6			3.7

		100.0	%		100.0	%