Frequencies for first 10,000 rows of prov1380 variable in pos1991 dataset :

technicians |
-aa plus 60 |
 credit hrs |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,899       98.99       98.99
          1 |         46        0.46       99.45
          2 |         18        0.18       99.63
          3 |         11        0.11       99.74
          4 |          8        0.08       99.82
          5 |          4        0.04       99.86
          6 |          1        0.01       99.87
          7 |          4        0.04       99.91
          9 |          1        0.01       99.92
         14 |          1        0.01       99.93
         15 |          2        0.02       99.95
         29 |          1        0.01       99.96
         37 |          1        0.01       99.97
         47 |          1        0.01       99.98
         78 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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