Summary statistics for ctwbo19ages dataset : by Jean Roth , jroth@nber.org , 2 May 2017 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 42,696 1992.035 13.56664 1969 2015 st | 0 stfips | 0 county | 0 registry | 42,696 2 0 2 2 -------------+--------------------------------------------------------- race | 42,696 1.997096 .8163288 1 3 hispanic | 42,696 9 0 9 9 sex | 42,696 1.500749 .5000053 1 2 age | 42,696 8.969412 5.465573 0 18 pop | 42,696 3642.179 6793.013 1 38813 by Jean Roth , jroth@nber.org , 2 May 2017