Frequencies for first 10,000 rows of econdp_3 variable in linkco1991us_num dataset :

  Part/line |
  number on |
certificate |
          3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         56        0.56        0.56
          2 |        777        7.77        8.33
          3 |      2,707       27.07       35.40
          4 |         29        0.29       35.69
          6 |        998        9.98       45.67
          . |      5,433       54.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015