Frequencies for first 10,000 rows of cl_srvc_desc variable in pos2013 dataset :

          Services: Clinical Laboratory |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                        |      8,601       86.01       86.01
                           NOT PROVIDED |         57        0.57       86.58
                      PROVIDED BY STAFF |        886        8.86       95.44
PROVIDED BY STAFF AND UNDER ARRANGEMENT |        187        1.87       97.31
             PROVIDED UNDER ARRANGEMENT |        269        2.69      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016