Frequencies for first 10,000 rows of major variable in namcs1998 dataset :

           major reason for the visit |      Freq.     Percent        Cum.
--------------------------------------+-----------------------------------
                        Acute problem |      4,359       43.59       43.59
             Chronic problem, routine |      2,187       21.87       65.46
             Chronic problem, flareup |        759        7.59       73.05
Pre- or post-surgery, injury followup |        742        7.42       80.47
                     Non-illness care |      1,783       17.83       98.30
                     Blank or unknown |        170        1.70      100.00
--------------------------------------+-----------------------------------
                                Total |     10,000      100.00

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