Frequencies for first 10,000 rows of prov2710 variable in posclia2009 dataset :

      state |
region code |      Freq.     Percent        Cum.
------------+-----------------------------------
        001 |      3,648       36.48       36.48
         AZ |      1,260       12.60       49.08
        LAB |      5,091       50.91       99.99
         M2 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016