added CI, made all graphs quadratic to be consistent; i decided not to standarize variables--see added discussion at the end in section 'Comparability of Results';added fitstats to regression table;added correlation table right after regression results; maybe show regression fit lines after controlling for other things...then regression lines would be flatter, or could color country codes in graphs based on climate, density, etc; TODO need to look at density, start polishing and interpreting