Frequencies for first 10,000 rows of clintype variable in nhamcsopd2002 dataset :

    type of |
     clinic |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      3,060       30.60       30.60
          2 |      2,118       21.18       51.78
          3 |      1,574       15.74       67.52
          4 |      1,937       19.37       86.89
          5 |        111        1.11       88.00
          6 |      1,200       12.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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