Frequencies for first 10,000 rows of mdcr_prtcptn_op_pt_spch_sw variable in pos1992 dataset :

participati |
on medicare |
     opt/sp |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,961       99.61       99.61
          N |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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