Frequencies for first 10,000 rows of region variable in nhamcsed2001 dataset :

 geographic |
     region |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,283       52.83       52.83
          2 |      3,626       36.26       89.09
          3 |        768        7.68       96.77
          4 |        323        3.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016