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

        BMI |
(prepregnan |
    cy) RFP |
 576=f_m_ht |
          R |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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