Frequencies for first 10,000 rows of pgm_prtcptn_cd variable in pos2010 dataset :

    PROGRAM |
PARTICIPATI |
         ON |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,525       45.25       45.25
          1 |        544        5.44       50.69
          2 |        731        7.31       58.00
          3 |      4,200       42.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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