Frequencies for first 10,000 rows of prov1620 variable in posclia2009 dataset :

      prior |
intermediar |
   y number |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,895       98.95       98.95
      00030 |          8        0.08       99.03
      00320 |          1        0.01       99.04
      00520 |          3        0.03       99.07
      01030 |         85        0.85       99.92
      03001 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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