Table: eu_enlargement_stats_5
Columns: member_countries
population
area_km
gdp_billion_us
gdp_per_capita_us

Question: What is the per-capita GDP for the country with an overall GDP of 156.640?
SQL: SELECT "gdp_per_capita_us" FROM eu_enlargement_stats_5 WHERE "gdp_billion_us" = '156.640'

Question: What is the per-capita GDP of the country with an overall GDP of 80.955?
SQL: SELECT "gdp_per_capita_us" FROM eu_enlargement_stats_5 WHERE "gdp_billion_us" = '80.955'

Question: Which country has an area of 871,980 square km?
SQL: SELECT "member_countries" FROM eu_enlargement_stats_5 WHERE "area_km" = '871,980'