Summary statistics for c_1_c7_55 variable in hosp_rollup2552_96_2009 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- c_1_c7_55 | 5,161 8724779 1.52e+07 3 2.05e+08 by Jean Roth , jroth@nber.org , 21 Apr 2018