Waxaa caan ku ah dalalka dakhligoodu sarreeyo, kuwa dhexdhexaadka ah, iyo kuwa dakhligoodu hooseeyo. Sanadkii 2004 heerarka dhiig karka ayaa ugu sarreeyey Afrika, (30% labada jinsiba) iyo kuwa ugu hooseeya Ameerika (18% labada jinsiba). Heerarka ayaa sidoo kale si aad ah ugu kala duwan gobollada heerarka hooseeya ee 3.4% (ragga) iyo 6.8% (haweenka) ee miyiga Hindiya iyo heerka sareeya ee 68.9% (ragga) iyo 72.5% (haweenka) ee Poland.
hal mar