Frequencies for first 10,000 rows of econdp_9 variable in linkco1991us_num dataset :

  Part/line |
  number on |
certificate |
          9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          6 |         17        0.17        0.17
          . |      9,983       99.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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