Frequencies for first 10,000 rows of gnrl_cntl_type_cd variable in pos2000 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        101        1.01        1.01
         01 |      1,845       18.45       19.46
         02 |      1,440       14.40       33.86
         03 |      2,849       28.49       62.35
         04 |      1,321       13.21       75.56
         05 |        500        5.00       80.56
         06 |        898        8.98       89.54
         07 |        318        3.18       92.72
         08 |        194        1.94       94.66
         09 |         17        0.17       94.83
         10 |          1        0.01       94.84
         11 |         11        0.11       94.95
         12 |          7        0.07       95.02
         13 |          4        0.04       95.06
         1A |         47        0.47       95.53
         1B |        149        1.49       97.02
         1C |         22        0.22       97.24
         2A |          5        0.05       97.29
         2B |        270        2.70       99.99
         2C |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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