Frequencies for first 10,000 rows of acc_usunwrng variable in mcbsatc2013 datas

         Dr |
 completely |
understands |
     what's |
      wrong |      Freq.     Percent        Cum.
------------+-----------------------------------
         -8 |         96        0.96        0.96
         -7 |          2        0.02        0.98
          1 |      3,996       39.96       40.94
          2 |      4,689       46.89       87.83
          3 |        404        4.04       91.87
          4 |         41        0.41       92.28
          5 |         64        0.64       92.92
          . |        708        7.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 24 May 2016