Frequencies for first 10,000 rows of econdp_6 variable in linkco1991us_num dataset :

  Part/line |
  number on |
certificate |
          6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.01        0.01
          2 |          4        0.04        0.05
          3 |         18        0.18        0.23
          4 |         17        0.17        0.40
          5 |          5        0.05        0.45
          6 |        264        2.64        3.09
          . |      9,691       96.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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