instruction: What is the total poverty (2009) HPI-1 % when the extreme poverty (2011) <1.25 US$ % of 16.9, and the human development (2012) HDI is less than 0.581?
response: SELECT SUM("Poverty (2009) HPI-1 %") FROM table_79329 WHERE "Extreme poverty (2011) <1.25 US$ %" = '16.9' AND "Human development (2012) HDI" < '0.581'