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

Last Normal |
   Menses - |
   Year U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
       2007 |          1        0.01        0.01
       2008 |      9,050       90.50       90.51
       2009 |        857        8.57       99.08
       9999 |         92        0.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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