Helmut Melzer
Ho 1820, ho ne ho na le batho ba ka bang limilione tse likete tsa 1,1 lefatšeng, bao ba fetang limilione tse likete tsa 1 ba neng ba phela bofutsaneng bo feteletseng (tlasa liranta tsa 1.90 ka letsatsi). Ho tloha ka 1970, re phela lefatšeng leo palo ea batho bao eseng mafutsana e ntseng e eketseha, athe palo ea mafutsana e ntse e theoha haholo. Batho ba limilione tse likete tsa 1970 2,2 ba ne ba phela bofutsaneng bo feteletseng, 2015 e ne e ntse e le limilione tsa 705, e leng liperesente tse robeli tsa baahi ba lefatše. Tlhahlobo ea UN e bonts'a ho theoha ho hoholo ho liperesente tse 'ne ka 2030 ea selemo.
