A life insurance agent found the following data for distribution of ages of 99 policy holders. Calculate the median age, if policies are given only to persons having age \(18\) years onwards but less than \(60\) year.
 
Age (in years) Number of policy holders
Below \(20\) 2
Below \(25\) 4
Below \(30\) 20
Below \(35\) 42
Below \(40\) 76
Below \(45\) 89
Below \(50\) 91
Below \(55\) 96
Below \(60\) 99
 
Median \(=\) _________