Frequencies for first 10,000 rows of prov2710 variable in pos1997 dataset :

     states |
region code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        120        1.20        1.20
        001 |      3,431       34.31       35.51
         AZ |        871        8.71       44.22
        BER |        318        3.18       47.40
         BK |        364        3.64       51.04
         FR |        415        4.15       55.19
         L1 |        412        4.12       59.31
         L2 |        345        3.45       62.76
         L3 |         90        0.90       63.66
         L4 |        336        3.36       67.02
         L5 |        317        3.17       70.19
        ORG |        281        2.81       73.00
        RIV |        177        1.77       74.77
         S1 |        406        4.06       78.83
         S3 |        232        2.32       81.15
         SA |         70        0.70       81.85
         SB |         59        0.59       82.44
         SD |        430        4.30       86.74
         SF |        258        2.58       89.32
         SJ |        290        2.90       92.22
         SR |        311        3.11       95.33
        TUC |        146        1.46       96.79
        VEN |        321        3.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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