Helmut Melzer
Mumazana mashoma apfuura, huwandu hwenyika hwawedzera zvakanyanya kune vanopfuura mabhiriyoni manomwe. Pakati pa1900 na2000, kuwedzera kwacho kwakawedzera zvakapetwa katatu kupfuura zvese munhoroondo yevanhu zvisati zvaitika - kuwedzera kubva kumazana mashanu kusvika kuzviuru nemazana matanhatu emazana emazana emakore zana chete. Asi kunyangwe pano pane zvakanaka zvirikuitika kuti ucherechedze. Kukura kwegore rese (chati) yakatodzika kubva ku1,5 muzana kusvika ku6,1 muzana (100). Vanofembera vanotaura nezve kuderera kukuru kusvika ku2,1 muzana panosvika gore ra 1,2. Saka kune hafu yezana ramakore apfuura tave kurarama munyika umo kukura kwehuwandu kuri kuderera. Zvakadaro, ruzhinji rwepasi rose ruchawedzera zvishoma nezvishoma kusvika kune rakakura kwazvo mabhiriyoni 2015 pakasvika 0,1, mushure meizvozvo kuderera kwehuwandu hwepasirese kunoratidzika kunge kunogoneka.
