Frequencies for first 10,000 rows of impact2 variable in person dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,292       12.92       12.92
          1 |        179        1.79       14.71
          2 |        209        2.09       16.80
          3 |        520        5.20       22.00
          4 |        117        1.17       23.17
          5 |         66        0.66       23.83
          6 |        440        4.40       28.23
          7 |        126        1.26       29.49
          8 |         73        0.73       30.22
          9 |        605        6.05       36.27
         10 |        114        1.14       37.41
         11 |        444        4.44       41.85
         12 |      4,260       42.60       84.45
         13 |        140        1.40       85.85
         14 |        260        2.60       88.45
         99 |        473        4.73       93.18
          . |        682        6.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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