Frequencies for first 10,000 rows of mdcr_prtcptn_op_pt_spch_sw variable in pos2000 dataset :

participati |
on medicare |
     opt/sp |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,921       99.21       99.21
          N |         75        0.75       99.96
          Y |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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