Frequencies for first 10,000 rows of asth_sev variable in namcs2014 dataset :

    Asthma severity |      Freq.     Percent        Cum.
--------------------+-----------------------------------
              Blank |         64        0.64        0.64
     Not applicable |      9,437       94.37       95.01
       Intermittent |         61        0.61       95.62
    Mild persistent |         37        0.37       95.99
Moderate persistent |         23        0.23       96.22
  Severe persistent |          7        0.07       96.29
    Other - Specify |         23        0.23       96.52
      None recorded |        348        3.48      100.00
--------------------+-----------------------------------
              Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017