10-•-1—— -1-1-1
16-25 26-65 36-45 46-55 56-65 66-75
Age (years)
— * Not farm/>10 000 inh. • * 'Not farm/<10 000 inh.
Farm/> 10 000 inh. “• ■ Farm /< 10 000 inh.
i........Oyęrall prevalence