Frequencies for first 10,000 rows of agefl variable in nhamcsed2014 dataset :

Was patient age reported, calculated or |
                               imputed? |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
Age calculated by NCHS based on imputed |          1        0.01        0.01
Age calculated by NCHS based on reporte |      9,994       99.94       99.95
Age entered in survey instrument withou |          5        0.05      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017