Frequencies for first 10,000 rows of asth_sev variable in namcs2013 dataset :

    Asthma severity |      Freq.     Percent        Cum.
--------------------+-----------------------------------
              Blank |         45        0.45        0.45
     Not applicable |      9,316       93.16       93.61
       Intermittent |         84        0.84       94.45
    Mild persistent |         44        0.44       94.89
Moderate persistent |         36        0.36       95.25
  Severe persistent |         10        0.10       95.35
    Other - Specify |         26        0.26       95.61
      None recorded |        439        4.39      100.00
--------------------+-----------------------------------
              Total |     10,000      100.00

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