Which country, of those listed below, has the lowest percentage of women in senior management?

As there is no countries listed but the percentage of women in senior management of some countries are as follows:

Women in senior management in China = 50%

Women in Senior management in Poland = 48%

In Germany = 30%

and in United States = 20%

Now you can see that which country has lowest percentage of women in senior management and that is United States.