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Stock-Based Compensation (Tables)
 3 Months Ended
Aug. 31, 2018
Non-Qualified Stock Options  
Schedule of Assumptions Used to Determine Fair Value of Stock Options

The following assumptions were used to value these stock options:

 

Dividend yield

 

 

2.01

%

Expected volatility

 

 

33.04

%

Risk-free interest rate

 

 

2.77

%

Expected term (years)

 

 

6.0