Frequencies for first 10,000 rows of pct020b025 variable in sf12010860us37 dataset :

   Military |
ships (602) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,989       99.89       99.89
          1 |          1        0.01       99.90
          4 |          1        0.01       99.91
          5 |          1        0.01       99.92
          9 |          1        0.01       99.93
         16 |          2        0.02       99.95
         21 |          1        0.01       99.96
         26 |          1        0.01       99.97
         49 |          1        0.01       99.98
        308 |          1        0.01       99.99
       5119 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Apr 2017