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

         Major reason for this visit |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                               Blank |        372        3.72        3.72
New problem (less than 3 mos. onset) |      2,973       29.73       33.45
            Chronic problem, routine |      3,311       33.11       66.56
           Chronic problem, flare-up |        753        7.53       74.09
                         Pre-surgery |        172        1.72       75.81
                        Post-surgery |        609        6.09       81.90
                     Preventive care |      1,810       18.10      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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