Summary statistics for c_1_c6_40 variable in hosp_rollup2552_96_1998 dataset : Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- c_1_c6_40 | 3,890 1564254 4094544 1 1.04e+08 by Jean Roth , jroth@nber.org , 6 Sep 2018