EX-12 4 serv-20171231xex12.htm EX-12 Exhibit 12

Exhibit 12



RATIO OF EARNINGS TO FIXED CHARGES



Our consolidated ratio of earnings to fixed charges is as follows:







 

 

 

 

 

 

 

 

 

 



 

Years Ended December 31,



 

2017

 

2016

 

2015

 

2014

 

2013

Ratio of Earnings to Fixed Charges

 

3.46

 

2.58

 

2.62

 

1.38

 

1.35