Frequencies for first 10,000 rows of state_rgn_cd variable in pos2012 dataset :

      State |
Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
        001 |      4,497       44.97       44.97
         AZ |      1,393       13.93       58.90
        BAK |         96        0.96       59.86
        BER |        169        1.69       61.55
         BK |        253        2.53       64.08
        BK1 |          8        0.08       64.16
         FR |        263        2.63       66.79
         L1 |        297        2.97       69.76
         L2 |        227        2.27       72.03
         L3 |         58        0.58       72.61
         L4 |        226        2.26       74.87
         L5 |        199        1.99       76.86
         M2 |          1        0.01       76.87
        ORG |        199        1.99       78.86
        RIV |        128        1.28       80.14
        RWC |        178        1.78       81.92
         S1 |        282        2.82       84.74
         S2 |         10        0.10       84.84
         S3 |        199        1.99       86.83
         SA |         28        0.28       87.11
         SB |         26        0.26       87.37
         SD |        237        2.37       89.74
        SDS |         80        0.80       90.54
         SF |        179        1.79       92.33
         SJ |        184        1.84       94.17
         SR |         76        0.76       94.93
        TUC |        335        3.35       98.28
        VEN |        172        1.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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