Frequencies for first 10,000 rows of econdp_2 variable in linkco1991us_num dataset :

  Part/line |
  number on |
certificate |
          2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        784        7.84        7.84
          2 |      5,635       56.35       64.19
          3 |         94        0.94       65.13
          4 |          5        0.05       65.18
          6 |        470        4.70       69.88
          . |      3,012       30.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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