Frequencies for first 10,000 rows of prov1255 variable in pos1995 dataset :

technicians |
-high sch + |
 experience |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,934       99.34       99.34
          1 |         31        0.31       99.65
          2 |         19        0.19       99.84
          3 |          4        0.04       99.88
          4 |          4        0.04       99.92
          5 |          2        0.02       99.94
          6 |          3        0.03       99.97
          7 |          1        0.01       99.98
         13 |          1        0.01       99.99
         29 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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