Frequencies for first 10,000 rows of prov2710 variable in pos1996 dataset :

     states |
region code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        120        1.20        1.20
        001 |      3,692       36.92       38.12
         AZ |        820        8.20       46.32
        BER |        476        4.76       51.08
         BK |        353        3.53       54.61
         FR |        404        4.04       58.65
         L1 |        367        3.67       62.32
         L2 |        340        3.40       65.72
         L3 |         84        0.84       66.56
         L4 |        329        3.29       69.85
         L5 |        311        3.11       72.96
        ORG |        270        2.70       75.66
         S1 |        391        3.91       79.57
         S3 |        217        2.17       81.74
         SA |         71        0.71       82.45
         SB |         59        0.59       83.04
         SD |        418        4.18       87.22
         SF |        249        2.49       89.71
         SJ |        283        2.83       92.54
         SR |        302        3.02       95.56
        TUC |        139        1.39       96.95
        VEN |        305        3.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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