Frequencies for educ_ref variable in fmli132 dataset :

   educ_ref |      Freq.     Percent        Cum.
------------+-----------------------------------
         00 |          3        0.04        0.04
         10 |        631        9.33        9.38
         11 |        226        3.34       12.72
         12 |      1,626       24.05       36.76
         13 |      1,428       21.12       57.88
         14 |        656        9.70       67.58
         15 |      1,367       20.22       87.80
         16 |        825       12.20      100.00
------------+-----------------------------------
      Total |      6,762      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016