Frequencies for first 10,000 rows of state_rgn_cd variable in pos2000 dataset :

     states |
region code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         99        0.99        0.99
        001 |      3,315       33.15       34.14
         AZ |        911        9.11       43.25
        BAK |        101        1.01       44.26
        BER |        312        3.12       47.38
         BK |        367        3.67       51.05
         FR |        401        4.01       55.06
         L1 |        437        4.37       59.43
         L2 |        336        3.36       62.79
         L3 |        107        1.07       63.86
         L4 |        326        3.26       67.12
         L5 |        308        3.08       70.20
        ORG |        272        2.72       72.92
        RIV |        167        1.67       74.59
         S1 |        319        3.19       77.78
         S2 |         95        0.95       78.73
         S3 |        234        2.34       81.07
         SA |         70        0.70       81.77
         SB |         59        0.59       82.36
         SD |        376        3.76       86.12
        SDS |        128        1.28       87.40
         SF |        241        2.41       89.81
         SJ |        289        2.89       92.70
         SR |        324        3.24       95.94
        TUC |        188        1.88       97.82
        VEN |        218        2.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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