names f t
class_21 16.7     29.23   
class_22 83.3      1.02   
class_31  8.0     46.26   
class_32 15.7      8.31   
class_33 76.2      0.92   
class_41  5.8     29.65   
class_42  6.0     50.68   
class_43 16.3      1.97   
class_44 71.9      0.90   
class_51  4.5     24.56   
class_52  4.2     64.40   
class_53  4.3     23.66   
class_54 17.3      1.53   
class_55 69.7      0.88