Frequencies for first 10,000 rows of ob_srvc_desc variable in pos2011 dataset :

          Services Provided: Obstetrics |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                        |      8,614       86.14       86.14
                           NOT PROVIDED |        768        7.68       93.82
                      PROVIDED BY STAFF |        557        5.57       99.39
PROVIDED BY STAFF AND UNDER ARRANGEMENT |         26        0.26       99.65
             PROVIDED UNDER ARRANGEMENT |         35        0.35      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019