Frequencies for first 10,000 rows of mplbirr variable in linkco1991us_num dataset :

   Place of |
   Birth of |
     Mother |
     Recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,706       77.06       77.06
          2 |      2,158       21.58       98.64
          3 |        136        1.36      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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