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 izinqubo. 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.