Frequencies for first 10,000 rows of no_infec variable in natlterr2015 dataset :

         No |
 Infections |
 Reported 1 |
       True |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        220        2.20        2.20
          1 |      8,595       85.95       88.15
          9 |        107        1.07       89.22
          . |      1,078       10.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016