Frequencies for first 10,000 rows of man_coll variable in vehicle dataset :

  MANNOR OF |
  COLLISION |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,352       43.52       43.52
          1 |        865        8.65       52.17
          2 |      1,810       18.10       70.27
          4 |      2,641       26.41       96.68
          5 |        158        1.58       98.26
          6 |        134        1.34       99.60
          9 |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016