Frequencies for first 10,000 rows of apgar10 variable in natl2011 dataset :

 Ten Minute |
Apgar Score |
        RFP |
579=f_apgar |
       10 R |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015