What is the current account balance for an export volume of goods and service value of -4.2?
CREATE TABLE table_4302 (
    "Year" real,
    "GDP at constant prices (THB trillions)" text,
    "GDP at constant prices growth rate (percent change)" text,
    "GDP at current prices (USD billions)" text,
    "Export volume of goods and services (percent change)" text,
    "Current account balance (percent of GDP)" text
)
SELECT "Current account balance (percent of GDP)" FROM table_4302 WHERE "Export volume of goods and services (percent change)" = '-4.2'
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 current account balance for an export volume of goods and service value of -4.2? ### Input: CREATE TABLE table_4302 (
    "Year" real,
    "GDP at constant prices (THB trillions)" text,
    "GDP at constant prices growth rate (percent change)" text,
    "GDP at current prices (USD billions)" text,
    "Export volume of goods and services (percent change)" text,
    "Current account balance (percent of GDP)" text
) ### Response: SELECT "Current account balance (percent of GDP)" FROM table_4302 WHERE "Export volume of goods and services (percent change)" = '-4.2'