Frequencies for first 10,000 rows of gnrl_cntl_type_cd variable in pos2010 dataset :

    TYPE OF |
    CONTROL |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         93        0.93        0.93
         01 |      1,583       15.83       16.76
         02 |      1,045       10.45       27.21
         03 |      2,913       29.13       56.34
         04 |      1,688       16.88       73.22
         05 |        539        5.39       78.61
         06 |      1,081       10.81       89.42
         07 |        218        2.18       91.60
         08 |        214        2.14       93.74
         09 |         17        0.17       93.91
         10 |         10        0.10       94.01
         11 |         11        0.11       94.12
         12 |          9        0.09       94.21
         13 |         35        0.35       94.56
         1A |         52        0.52       95.08
         1B |        178        1.78       96.86
         1C |         23        0.23       97.09
         2A |          4        0.04       97.13
         2B |        285        2.85       99.98
         2C |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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