count type       severity    ejected  weight
  350  collision  not.severe  no       small
  150  collision  severe      no       small
   60  rollover   not.severe  no       small
  112  rollover   severe      no       small
   26  collision  not.severe  yes      small
   23  collision  severe      yes      small
   19  rollover   not.severe  yes      small
   80  rollover   severe      yes      small
 1878  collision  not.severe  no       standard
 1022  collision  severe      no       standard
  148  rollover   not.severe  no       standard
  404  rollover   severe      no       standard
  111  collision  not.severe  yes      standard
  161  collision  severe      yes      standard
   22  rollover   not.severe  yes      standard
  265  rollover   severe      yes      standard