Frequencies for first 10,000 rows of retypoff variable in namcs2007 dataset :

                 type of office setting |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
         private solo or group practice |      9,011       90.11       90.11
         freestanding clinic/urgicenter |        656        6.56       96.67
          non-federal government clinic |         90        0.90       97.57
health maint org (hmo)/oth prepaid prac |        243        2.43      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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