Frequencies for first 10,000 rows of prov2970 variable in pos1992 dataset :

technologis |
   t-direct |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,893       98.93       98.93
        .25 |          1        0.01       98.94
         .4 |          1        0.01       98.95
         .5 |          1        0.01       98.96
        .63 |          1        0.01       98.97
         .8 |          1        0.01       98.98
          1 |         28        0.28       99.26
       1.25 |          1        0.01       99.27
        1.3 |          1        0.01       99.28
        1.5 |          1        0.01       99.29
          2 |         34        0.34       99.63
        2.5 |          3        0.03       99.66
          3 |         14        0.14       99.80
          4 |          7        0.07       99.87
          5 |          8        0.08       99.95
          6 |          3        0.03       99.98
          7 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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