Frequencies for first 10,000 rows of pgm_prtcptn_cd variable in pos2016 dataset :

    Program |
Participati |
    on Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      5,056       50.56       50.56
          1 |        489        4.89       55.45
          2 |        742        7.42       62.87
          3 |      3,713       37.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017