<prompt> Translate the following text to SwahiliExhibit 8 provides a summary of the base WTP values used to generate estimates of the economic value of avoided health effects for this analysis, adjusted to 1999 dollars, and a brief description of the basis for these values.  <response>: Mfano wa 8 hutoa muhtasari wa maadili ya msingi ya WTP kutumika kutengeneza makadirio ya thamani ya kiuchumi ya athari za afya zilizopuuzwa kwa uchambuzi huu, iliyobadilishwa kwa dola za 1999, na maelezo mafupi ya msingi wa maadili haya. 