|
|
|
2017 |
|
2016 |
|
2015 |
|
|
Dividend yield (%) |
|
— |
|
— |
|
— |
|
|
Expected volatility |
|
39.45 |
% |
39.66 |
% |
37.07 |
% |
|
Risk-free interest rate |
|
1.24 |
% |
0.9 |
% |
0.60 |
% |
|
Expected life of share options |
|
2 years |
|
2 years |
|
2 years |
|