Frequencies for first 10,000 rows of clinic variable in nhamcsed1997 dataset :

   hospital |
clinic code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,347       83.47       83.47
          2 |        844        8.44       91.91
          3 |        376        3.76       95.67
          4 |        186        1.86       97.53
          5 |        142        1.42       98.95
          6 |         55        0.55       99.50
          7 |         26        0.26       99.76
          8 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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