Frequencies for first 10,000 rows of rgn_cd variable in pos1995 dataset :

region code |      Freq.     Percent        Cum.
------------+-----------------------------------
         04 |      1,576       15.76       15.76
         06 |      1,526       15.26       31.02
         09 |      6,711       67.11       98.13
         10 |        187        1.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017