Frequencies for first 10,000 rows of state_rgn_cd variable in pos2010 dataset :

      STATE |
REGION CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         87        0.87        0.87
        001 |      4,114       41.14       42.01
         AZ |      1,242       12.42       54.43
        BAK |         86        0.86       55.29
        BER |        208        2.08       57.37
         BK |        279        2.79       60.16
        BK1 |         17        0.17       60.33
         FR |        285        2.85       63.18
         L1 |        354        3.54       66.72
         L2 |        272        2.72       69.44
         L3 |         95        0.95       70.39
         L4 |        270        2.70       73.09
         L5 |        251        2.51       75.60
         M2 |          1        0.01       75.61
        ORG |        219        2.19       77.80
        RIV |        140        1.40       79.20
        RWC |        193        1.93       81.13
         S1 |        304        3.04       84.17
         S2 |         15        0.15       84.32
         S3 |        202        2.02       86.34
         SA |         42        0.42       86.76
         SB |         35        0.35       87.11
         SD |        256        2.56       89.67
        SDS |         80        0.80       90.47
         SF |        207        2.07       92.54
         SJ |        181        1.81       94.35
         SR |         81        0.81       95.16
        TUC |        302        3.02       98.18
        VEN |        182        1.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017