Frequencies for first 10,000 rows of aoi2 variable in cevent dataset :

    Area of |
   Impact 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         40        0.40        0.40
          2 |         15        0.15        0.55
          3 |        105        1.05        1.60
          4 |         25        0.25        1.85
          5 |         15        0.15        2.00
          6 |        283        2.83        4.83
          7 |         37        0.37        5.20
          8 |         41        0.41        5.61
          9 |        140        1.40        7.01
         10 |         41        0.41        7.42
         11 |         84        0.84        8.26
         12 |        483        4.83       13.09
         13 |         10        0.10       13.19
         14 |         16        0.16       13.35
         18 |         17        0.17       13.52
         55 |      8,428       84.28       97.80
         61 |         56        0.56       98.36
         62 |         34        0.34       98.70
         63 |         19        0.19       98.89
         81 |         39        0.39       99.28
         82 |         25        0.25       99.53
         83 |         10        0.10       99.63
         98 |         11        0.11       99.74
         99 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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