Frequencies for first 10,000 rows of rf_pdiab variable in natlterr2014 dataset 

Pre-pregnan |
cy Diabetes |
      Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,077       10.77       10.77
          N |      8,720       87.20       97.97
          U |         76        0.76       98.73
          Y |        127        1.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016