Frequencies for first 10,000 rows of aabb_acrdtd_y_match_dt variable in posclia2016 dataset :

    AO AABB |
 Accredited |
    Y Match |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
   2.00e+07 |          1        0.01        0.01
          . |      9,999       99.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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