Frequencies for first 10,000 rows of prov2710 variable in pos1995 dataset :

     states |
region code |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        109        1.09        1.09
        001 |      3,261       32.61       33.70
         AZ |        981        9.81       43.51
        BER |        440        4.40       47.91
         BK |        331        3.31       51.22
         FR |        370        3.70       54.92
         L1 |        331        3.31       58.23
         L2 |        302        3.02       61.25
         L3 |         73        0.73       61.98
         L4 |        301        3.01       64.99
         L5 |        286        2.86       67.85
        LAB |         11        0.11       67.96
         M1 |        400        4.00       71.96
         M2 |        311        3.11       75.07
        ORG |        239        2.39       77.46
         S1 |        364        3.64       81.10
         S3 |        196        1.96       83.06
         SA |         71        0.71       83.77
         SB |         66        0.66       84.43
         SD |        385        3.85       88.28
         SF |        225        2.25       90.53
         SJ |        263        2.63       93.16
         SR |        282        2.82       95.98
        TUC |        139        1.39       97.37
        VEN |        263        2.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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