Frequencies for first 10,000 rows of state_rgn_cd variable in pos2018 dataset :

      State |
Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
        001 |      4,712       47.12       47.12
         AZ |      1,825       18.25       65.37
        BAK |         91        0.91       66.28
        BER |        158        1.58       67.86
         BK |        229        2.29       70.15
        BK1 |          6        0.06       70.21
         FR |        251        2.51       72.72
         L1 |        238        2.38       75.10
         L2 |        239        2.39       77.49
         L3 |         43        0.43       77.92
         L4 |        209        2.09       80.01
         L5 |        173        1.73       81.74
        LAB |          1        0.01       81.75
         M2 |          1        0.01       81.76
        ORG |        162        1.62       83.38
        RIV |        118        1.18       84.56
        RWC |        165        1.65       86.21
         S1 |        242        2.42       88.63
         S2 |          5        0.05       88.68
         S3 |        183        1.83       90.51
         SD |        177        1.77       92.28
        SDS |         76        0.76       93.04
         SF |        137        1.37       94.41
         SJ |        173        1.73       96.14
         SR |         56        0.56       96.70
        TUC |        180        1.80       98.50
        VEN |        150        1.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019