Frequencies for econdp_3 variable in linkco1995us_unl dataset :

  Part/line |
  number on |
certificate |
          3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          6        0.85        0.85
          2 |         55        7.77        8.62
          3 |        149       21.05       29.66
          4 |          2        0.28       29.94
          6 |         48        6.78       36.72
          . |        448       63.28      100.00
------------+-----------------------------------
      Total |        708      100.00

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