Frequencies for first 10,000 rows of uca_spina variable in natlterr2008 dataset :

      Spina |
bifida/Meni |
ngocele RFP |
753=f_uca_s |
   pina U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |      8,660       86.60       86.60
          9 |      1,340       13.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016