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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        881        8.81        8.81
          1 |        349        3.49       12.30
          2 |        203        2.03       14.33
          3 |        613        6.13       20.46
          4 |        100        1.00       21.46
          5 |         97        0.97       22.43
          6 |        370        3.70       26.13
          7 |        126        1.26       27.39
          8 |        124        1.24       28.63
          9 |        661        6.61       35.24
         10 |        158        1.58       36.82
         11 |        484        4.84       41.66
         12 |      4,177       41.77       83.43
         13 |        207        2.07       85.50
         14 |        218        2.18       87.68
         99 |        472        4.72       92.40
          . |        760        7.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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