Frequencies for first 10,000 rows of clinic variable in nhamcsopd1994 dataset :

   hospital |
clinic code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,107       21.07       21.07
          2 |      1,734       17.34       38.41
          3 |      1,125       11.25       49.66
          4 |      1,209       12.09       61.75
          5 |      1,398       13.98       75.73
          6 |        323        3.23       78.96
          7 |        113        1.13       80.09
          8 |        244        2.44       82.53
          9 |        113        1.13       83.66
         11 |        311        3.11       86.77
         12 |        390        3.90       90.67
         14 |        137        1.37       92.04
         23 |        216        2.16       94.20
         29 |        155        1.55       95.75
         32 |         96        0.96       96.71
         40 |        148        1.48       98.19
         50 |        181        1.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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