Table: mercosur_countries
Columns: country
population_in_2011_in_thousands
gdp_nominal_in_2011_usd_millions
gdp_nominal_per_capita
gdp_ppp_in_2011_usd_millions
gdp_ppp_per_capita
merchandise_exports_billions_2011
merchandise_imports_billions_2011
exports_to_mercosur_of_each_2010
imports_from_mercosur_of_each_2010

Question: How many different imports from Mercosur had a % of 18.0?
SQL: SELECT COUNT("gdp_nominal_per_capita") FROM mercosur_countries WHERE "imports_from_mercosur_of_each_2010" = '18.0'

Question: What is the GDP (ppp) in 2011 when the imports from Mercosur is 48.8?
SQL: SELECT MIN("gdp_ppp_in_2011_usd_millions") FROM mercosur_countries WHERE "imports_from_mercosur_of_each_2010" = '48.8'

Question: What is the lowest GDP (ppp) per capita?
SQL: SELECT MIN("gdp_ppp_per_capita") FROM mercosur_countries