Frequencies for first 10,000 rows of state_rgn_cd variable in pos2003 dataset :

     states |
region code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        100        1.00        1.00
        001 |      3,601       36.01       37.01
         AZ |      1,015       10.15       47.16
        BAK |         81        0.81       47.97
        BER |        283        2.83       50.80
         BK |        208        2.08       52.88
        BK1 |        140        1.40       54.28
         FR |        325        3.25       57.53
         L1 |        452        4.52       62.05
         L2 |        328        3.28       65.33
         L3 |        149        1.49       66.82
         L4 |        305        3.05       69.87
         L5 |        297        2.97       72.84
         M2 |          1        0.01       72.85
        ORG |        242        2.42       75.27
        RIV |        137        1.37       76.64
        RWC |        164        1.64       78.28
         S1 |        254        2.54       80.82
         S2 |        117        1.17       81.99
         S3 |        224        2.24       84.23
         SA |         62        0.62       84.85
         SB |         50        0.50       85.35
         SD |        360        3.60       88.95
        SDS |         86        0.86       89.81
         SF |        220        2.20       92.01
         SJ |        262        2.62       94.63
         SR |        151        1.51       96.14
        TUC |        204        2.04       98.18
        VEN |        182        1.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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