Frequencies for first 10,000 rows of econdp_4 variable in linkco1991us_num dataset :

  Part/line |
  number on |
certificate |
          4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         10        0.10        0.10
          2 |        102        1.02        1.12
          3 |        486        4.86        5.98
          4 |        306        3.06        9.04
          5 |          2        0.02        9.06
          6 |      1,339       13.39       22.45
          . |      7,755       77.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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