Frequencies for first 10,000 rows of gnrl_cntl_type_cd variable in pos2009 dataset :

    TYPE OF |
    CONTROL |      Freq.     Percent        Cum.
------------+-----------------------------------
            |         92        0.92        0.92
         01 |      1,568       15.68       16.60
         02 |      1,031       10.31       26.91
         03 |      2,895       28.95       55.86
         04 |      1,766       17.66       73.52
         05 |        536        5.36       78.88
         06 |      1,068       10.68       89.56
         07 |        228        2.28       91.84
         08 |        214        2.14       93.98
         09 |         17        0.17       94.15
         10 |         10        0.10       94.25
         11 |         12        0.12       94.37
         12 |          8        0.08       94.45
         13 |         30        0.30       94.75
         1A |         54        0.54       95.29
         1B |        172        1.72       97.01
         1C |         24        0.24       97.25
         2A |          5        0.05       97.30
         2B |        268        2.68       99.98
         2C |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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