Luminosity vs. redshift for the survey. The unshaded area includes the objects used for the binned analysis of the luminosity function with redshift bins indicated by dotted lines (all objects were used in the maximum-likelihood fit). The dashed horizontal line represents the approximate division between AGNs for Seyfert and quasar luminosities at a bolometric luminosity of 10﹩^{12}\;{{L}_{\odot }}﹩ corresponding to ﹩{{{\rm log} }_{10}}(\nu {{L}_{5\,\mu {\rm m}}})\approx \;44.6\ \;{\rm erg}{{{\rm s}}^{-1}}﹩.