Frequencies for first 10,000 rows of major variable in namcs2002 dataset :

   Major reason for visit |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
                    Blank |        393        3.93        3.93
            Acute problem |      3,480       34.80       38.73
 Chronic problem, routine |      3,110       31.10       69.83
Chronic problem, flare-up |        951        9.51       79.34
         Pre/Post-surgery |        783        7.83       87.17
          Preventive care |      1,283       12.83      100.00
--------------------------+-----------------------------------
                    Total |     10,000      100.00

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