Frequencies for first 10,000 rows of pct016038 variable in sf12000860us15 dataset :

   Military |
      ships |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,970       99.70       99.70
          1 |          2        0.02       99.72
          2 |          2        0.02       99.74
          3 |          2        0.02       99.76
          4 |          1        0.01       99.77
          6 |          2        0.02       99.79
          9 |          2        0.02       99.81
         10 |          2        0.02       99.83
         11 |          1        0.01       99.84
         15 |          1        0.01       99.85
         17 |          1        0.01       99.86
         22 |          1        0.01       99.87
         31 |          1        0.01       99.88
         33 |          1        0.01       99.89
         42 |          1        0.01       99.90
         55 |          1        0.01       99.91
         61 |          1        0.01       99.92
         71 |          1        0.01       99.93
         78 |          1        0.01       99.94
         97 |          1        0.01       99.95
        722 |          1        0.01       99.96
        979 |          1        0.01       99.97
       1152 |          1        0.01       99.98
       2292 |          1        0.01       99.99
      14452 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2017