Frequencies for first 10,000 rows of pt_onst_rsdnt_sw variable in pos2009 dataset :

  SRV: PHYS |
THER-ONSITE |
 -RESIDENTS |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,657       76.57       76.57
          N |        189        1.89       78.46
          Y |      2,154       21.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017