country gdp (usd bln, 2012) gdp (usd bln, 2017) gdp (usd ppp bln, 2012) gdp (usd ppp bln, 2017) per capita (usd, 2012) per capita (usd, 2017) per capita (usd ppp, 2012) per capita (usd ppp, 2017)
country
gdp -lrb- usd bln , 2012 -rrb-
gdp -lrb- usd bln , 2017 -rrb-
gdp -lrb- usd ppp bln , 2012 -rrb-
gdp -lrb- usd ppp bln , 2017 -rrb-
per capita -lrb- usd , 2012 -rrb-
per capita -lrb- usd , 2017 -rrb-
per capita -lrb- usd ppp , 2012 -rrb-
per capita -lrb- usd ppp , 2017 -rrb-
number
number
number
number
number
number
number
number
text number number number number number number number number
afghanistan 19.85 28.45 31.80 45.30 619.89 766.43 993.23 1,220.52
what is the sum of the gdp -lrb- usd ppp bin , 2012 -rrb- between niger and sierra ?
WP VBD-AUX DT NN IN DT NNP -LRB- NNP NNP NNP , CD -RRB- IN NNP CC NNP .
21.91
select sum ( c4_number ) from w where c1 in ( 'niger' , 'sierra leone' )