Frequencies for first 10,000 rows of ca_mnsb variable in natlterr2008 dataset :

Meningomyel |
ocele/Spina |
 Bifida RFP |
636=f_ca_me |
      nin R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,061       60.61       60.61
          N |      3,939       39.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016