Frequencies for first 10,000 rows of state_rgn_cd variable in pos2011 dataset :

      State |
Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
        001 |      4,368       43.68       43.68
         AZ |      1,356       13.56       57.24
        BAK |         94        0.94       58.18
        BER |        173        1.73       59.91
         BK |        257        2.57       62.48
        BK1 |          8        0.08       62.56
         FR |        271        2.71       65.27
         L1 |        306        3.06       68.33
         L2 |        235        2.35       70.68
         L3 |         58        0.58       71.26
         L4 |        233        2.33       73.59
         L5 |        201        2.01       75.60
         M2 |          1        0.01       75.61
        ORG |        205        2.05       77.66
        RIV |        129        1.29       78.95
        RWC |        177        1.77       80.72
         S1 |        290        2.90       83.62
         S2 |         12        0.12       83.74
         S3 |        202        2.02       85.76
         SA |         33        0.33       86.09
         SB |         28        0.28       86.37
         SD |        245        2.45       88.82
        SDS |         80        0.80       89.62
         SF |        191        1.91       91.53
         SJ |        188        1.88       93.41
         SR |         74        0.74       94.15
        TUC |        328        3.28       97.43
        UNK |         84        0.84       98.27
        VEN |        173        1.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019