Frequencies for first 10,000 rows of gnrl_cntl_type_cd variable in pos2003 dataset :

    type of |
    control |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        102        1.02        1.02
         01 |      1,949       19.49       20.51
         02 |      1,012       10.12       30.63
         03 |      2,944       29.44       60.07
         04 |      1,493       14.93       75.00
         05 |        521        5.21       80.21
         06 |        973        9.73       89.94
         07 |        229        2.29       92.23
         08 |        198        1.98       94.21
         09 |         17        0.17       94.38
         10 |          2        0.02       94.40
         11 |         11        0.11       94.51
         12 |          8        0.08       94.59
         13 |          5        0.05       94.64
         1A |         51        0.51       95.15
         1B |        160        1.60       96.75
         1C |         24        0.24       96.99
         2A |          5        0.05       97.04
         2B |        294        2.94       99.98
         2C |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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