Frequencies for first 10,000 rows of ca_menin variable in linkpe2013usnum datas

Meningomyel |
    ocele / |
      Spina |
   Bifida R |
(f_ca_menin |
  rep flag) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,684       16.84       16.84
          N |      8,027       80.27       97.11
          U |        273        2.73       99.84
          Y |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Jul 2017