Frequencies for first 10,000 rows of prov5165 variable in pos2001 dataset :

nurse aides |
  in trng - |
   contract |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,996       99.96       99.96
        .01 |          1        0.01       99.97
       1.83 |          1        0.01       99.98
       2.29 |          1        0.01       99.99
        6.8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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