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

         Major reason for this visit |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                               Blank |        196        1.96        1.96
New problem (less than 3 mos. onset) |      3,152       31.52       33.48
            Chronic problem, routine |      3,124       31.24       64.72
           Chronic problem, flare-up |        752        7.52       72.24
                   Pre-/Post-surgery |        745        7.45       79.69
                     Preventive care |      2,031       20.31      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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