Weather-normalized source EUI and source EUI columns exist and plot the histogram of both variable to figure out which variable is more reliable.  
Multifamily Housing STD is 1 order of magnitude bigger than mean so take the common logarithm of source EUI and weather-normalized EUI. The outliners are below and above 5% and 95% of the logarithm values. Fig.3 and Fig.4 correspond to results.