Summary statistics for s3_1_c19_8 variable in snf_rollup2540_96_2003 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
  s3_1_c19_8 |          1          23           .         23         23

by Jean Roth , jroth@nber.org , 17 Feb 2018