Frequencies for first 10,000 rows of msa variable in nhamcsed2008 dataset : msa or non-msa area | Freq. Percent Cum. ------------------------------------+----------------------------------- msa (metropolitan statistical area) | 8,331 83.31 83.31 non-msa | 1,669 16.69 100.00 ------------------------------------+----------------------------------- Total | 10,000 100.00 by Jean Roth , jroth@nber.org , 28 Mar 2016