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

      Match |
     Status |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,958       99.58       99.58
          2 |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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