Frequencies for first 10,000 rows of major variable in namcs2010 dataset :

              major reason for visit |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                               blank |        189        1.89        1.89
new problem (less than 3 mos. onset) |      4,241       42.41       44.30
            chronic problem, routine |      2,157       21.57       65.87
           chronic problem, flare-up |        679        6.79       72.66
                   pre-/post-surgery |        314        3.14       75.80
                     preventive care |      2,420       24.20      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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