Frequencies for first 10,000 rows of lpn variable in nhamcsopd2004 dataset :

   lpn seen |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,048       90.48       90.48
        yes |        952        9.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016