Har zuwa shekara ta 2013 an ƙiyasta cewa mutane biliyan 1.77 ke amfani da shaddar gargajiya. Yawaicin wannan a ƙasashen duniya masu tasowa da kuma ƙauyuka da dazuka. A shekara ta 2011 kimanin mutane biliyan 2.5 ba su da damar amfani da banɗakuna da suka dace kuma biliyan ɗaya sun gwammace biyan bukatarsu a fili a gewayensu. Kudancin Asiya da Hamadar Saharar Afirka su ke da mafi muni na samun dama ga banɗakuna. A ƙasashe masu tasowa, kuɗin da za'a kashe wajen gina masan gargajiya ya kama tsakanin Dalar Amurka 25 da 60. Ci gaba da gyara kan ci kuɗi tsakanin Dalar Amurka 1.5 da Dala 4 ga duk mutum guda a kowace shekara wanda wasu lokuta ba'a la'akari da wannan. A wasu ɓangarori na ƙauyukan Indiya shelar da aka yi ta ""Babu Banɗaki, Babu Mata"" an yi amfani da ita domin haɓaka banɗakuna ta hanyar ƙarfafawa mata domin su ƙi auren mutumin da ba shi da banɗaki.