Frequencies for first 10,000 rows of prov2710 variable in pos1999 dataset :

     states |
region code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        108        1.08        1.08
        001 |      3,237       32.37       33.45
         AZ |        895        8.95       42.40
        BER |        324        3.24       45.64
         BK |        375        3.75       49.39
         FR |        417        4.17       53.56
         L1 |        444        4.44       58.00
         L2 |        339        3.39       61.39
         L3 |        104        1.04       62.43
         L4 |        338        3.38       65.81
         L5 |        317        3.17       68.98
        ORG |        305        3.05       72.03
        RIV |        189        1.89       73.92
         S1 |        420        4.20       78.12
         S3 |        242        2.42       80.54
         SA |         70        0.70       81.24
         SB |         59        0.59       81.83
         SD |        444        4.44       86.27
         SF |        265        2.65       88.92
         SJ |        293        2.93       91.85
         SR |        310        3.10       94.95
        TUC |        173        1.73       96.68
        VEN |        332        3.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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