Frequencies for first 10,000 rows of srvy_prpse_cd variable in pos2012 dataset 

    Type of |
     Action |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |          1        0.01        0.01
          1 |      2,871       28.71       28.72
          2 |      6,570       65.70       94.42
          3 |        239        2.39       96.81
          4 |         10        0.10       96.91
          5 |        234        2.34       99.25
          8 |         75        0.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016