Frequencies for first 10,000 rows of major variable in namcs2001 dataset :

   major reason for visit |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
                    Blank |        630        6.30        6.30
            Acute problem |      3,107       31.07       37.37
 Chronic problem, routine |      3,406       34.06       71.43
Chronic problem, flare-up |        869        8.69       80.12
         Pre/Post-surgery |        792        7.92       88.04
          Preventive care |      1,196       11.96      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016