What is the lowest GDP (ppp) per capita?
CREATE TABLE table_3449 (
    "Country" text,
    "Population in 2011 (In thousands)" real,
    "GDP (nominal) in 2011 ( USD millions)" real,
    "GDP (nominal) per capita" real,
    "GDP (PPP) in 2011 ( USD millions)" real,
    "GDP (PPP) per capita" real,
    "Merchandise exports ($ billions), 2011" text,
    "Merchandise imports ($ billions), 2011" text,
    "Exports to Mercosur (% of each, 2010)" text,
    "Imports from Mercosur (% of each, 2010)" text
)
SELECT MIN("GDP (PPP) per capita") FROM table_3449
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the lowest GDP (ppp) per capita? ### Input: CREATE TABLE table_3449 (
    "Country" text,
    "Population in 2011 (In thousands)" real,
    "GDP (nominal) in 2011 ( USD millions)" real,
    "GDP (nominal) per capita" real,
    "GDP (PPP) in 2011 ( USD millions)" real,
    "GDP (PPP) per capita" real,
    "Merchandise exports ($ billions), 2011" text,
    "Merchandise imports ($ billions), 2011" text,
    "Exports to Mercosur (% of each, 2010)" text,
    "Imports from Mercosur (% of each, 2010)" text
) ### Response: SELECT MIN("GDP (PPP) per capita") FROM table_3449