Frequencies for first 10,000 rows of prov0750 variable in pos1995 dataset :

technologis |
 ts - bs/ba |
     degree |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,995       99.95       99.95
          1 |          2        0.02       99.97
          2 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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