Frequencies for first 10,000 rows of diagscrn variable in nhamcsed2012 dataset :

    Were diagnostic services ordered or |
                              provided? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                     No |      2,856       28.56       28.56
                                    Yes |      6,573       65.73       94.29
Entire item blank, including 'None' box |        571        5.71      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016