Frequencies for first 10,000 rows of rgn_cd variable in pos2009 dataset :

REGION CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
         04 |      1,872       18.72       18.72
         06 |      1,936       19.36       38.08
         09 |      5,932       59.32       97.40
         10 |        260        2.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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