Frequencies for first 10,000 rows of state_rgn_cd variable in pos2015 dataset :

      State |
Region Code |      Freq.     Percent        Cum.
------------+-----------------------------------
        001 |      4,530       45.30       45.30
         AZ |      1,460       14.60       59.90
        BAK |         95        0.95       60.85
        BER |        166        1.66       62.51
         BK |        249        2.49       65.00
        BK1 |          7        0.07       65.07
         FR |        261        2.61       67.68
         L1 |        288        2.88       70.56
         L2 |        217        2.17       72.73
         L3 |         52        0.52       73.25
         L4 |        224        2.24       75.49
         L5 |        187        1.87       77.36
         M2 |          1        0.01       77.37
        ORG |        195        1.95       79.32
        RIV |        124        1.24       80.56
        RWC |        183        1.83       82.39
         S1 |        276        2.76       85.15
         S2 |          7        0.07       85.22
         S3 |        198        1.98       87.20
         SA |         27        0.27       87.47
         SB |         26        0.26       87.73
         SD |        223        2.23       89.96
        SDS |         79        0.79       90.75
         SF |        174        1.74       92.49
         SJ |        186        1.86       94.35
         SR |         68        0.68       95.03
        TUC |        332        3.32       98.35
        VEN |        165        1.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016