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

         Services: Medical Surgical ICU |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                        |      8,601       86.01       86.01
                           NOT PROVIDED |        558        5.58       91.59
                      PROVIDED BY STAFF |        775        7.75       99.34
PROVIDED BY STAFF AND UNDER ARRANGEMENT |         34        0.34       99.68
             PROVIDED UNDER ARRANGEMENT |         32        0.32      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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