Green GDP of Ningxia Autonomous Region(Peking University, 1999) 90.1 1997 191.91 210.92 口GGDP/GDP% 口GGDP E GDP 95.1 1992 68.67 83.183.1 210.92 68.67 191.91 95.1 90.1 1992 1997 GGDP/GDP% GGDP GDP Green GDP of Ningxia Autonomous Region (Peking University, 1999)