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Geographical Information
 12 Months Ended
Dec. 31, 2016
Segment Reporting [Abstract]  
Geographical Information
11. Geographical Information
The following table is a summary of revenues by geographic region based on client billing address and has been estimated based on the amounts billed to clients during the periods (in thousands).
 
 
Year Ended December 31,
 
 
2016
 
2015
 
2014
United States
 
$
151,484

 
$
120,037

 
$
95,345

International
 
10,606

 
8,831

 
7,757

Total revenue
 
$
162,090

 
$
128,868

 
$
103,102

The following table summarizes total property and equipment, net in the respective locations (in thousands).
 
 
December 31,
 
 
2016
 
2015
 
2014
United States
 
$
13,025

 
$
10,939

 
$
10,625

International
 
1,663

 
2,286

 
1,946

Property and equipment, net
 
$
14,688

 
$
13,225

 
$
12,571