Imingcele Eyisisekelo Yezinqwaba Zeshidi Lensimbi

Izinqwaba zeshidi lensimbi eligoqelwe ngokushisayo ikakhulukazi zinemimo emithathu:Amashidi ensimbi amise okwe-U, Izinqwaba zeshidi lensimbi ezimise okuka-Zkanye nezinqwaba zeshidi lensimbi.Bheka Umfanekiso 1 ukuze uthole imininingwane.Phakathi kwazo, izinqwaba zeshidi lensimbi ezimise okwe-Z kanye nezinqwaba zamashidi ensimbi zibiza kakhulu ngenxa yokukhiqiza kwazo okuyinkimbinkimbi, ukucubungula nokufaka.Iphakeme ngo-1/3 kunezinqwaba zensimbi ezimise okwe-U.Manje isetshenziswa kakhulu eYurophu nase-United States.Izinqwaba zensimbi ezimise okwe-U zisetshenziswa kakhulu e-Asia, kubandakanya neChina.