1975 (MCMLXXV) ebile ngwaga wa go thoma ka Laboraro, ngwaga wa botshelela ngwagengsome wa 1970s, ngwaga wa bomasomešupa hlano ngwagengkgolo wa Ngwagakgolo 20, le ngwaga wa bomakgolo senyane masomešupa hlano ngwagengkete wa Ngwagakete 2.