Frequencies for first 10,000 rows of rectype variable in linkpe2009psden dataset :

Record Type |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,616       56.16       56.16
          2 |      4,384       43.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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