What is the poverty rate in the county that has a market income per capita of $16,420?
CREATE TABLE table_22815568_1 (
    poverty_rate VARCHAR,
    market_income_per_capita VARCHAR
)
SELECT poverty_rate FROM table_22815568_1 WHERE market_income_per_capita = "$16,420"
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 poverty rate in the county that has a market income per capita of $16,420? ### Input: CREATE TABLE table_22815568_1 (
    poverty_rate VARCHAR,
    market_income_per_capita VARCHAR
) ### Response: SELECT poverty_rate FROM table_22815568_1 WHERE market_income_per_capita = "$16,420"