Frequencies for first 10,000 rows of clinic variable in nhamcsed1996 dataset :

   hospital |
clinic code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,708       87.08       87.08
          2 |        791        7.91       94.99
          3 |        288        2.88       97.87
          4 |        100        1.00       98.87
          5 |         61        0.61       99.48
          6 |         23        0.23       99.71
          7 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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