Number count distribution based on the Swift-BAT 70-month survey data (solid line) along with the model predictions of the Akylas et al. (2012) X-ray background synthesis model. Their best-fit model with a Compton-thick fraction of 12% of the total AGN population and a reflected emission of 5% is shown with a dotted line. We also show a model with a Compton-thick fraction of 30% and no reflection (dashed line). Finally, the model of Ueda et al. (2014) is shown with a dot-dashed line. All are in reasonable agreement with the observed number counts