CREATE TABLE table_4303 ("Year" FLOAT, "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)

What is the current account balance for a GDP at current prices of 142.640?
SELECT "Current account balance (percent of GDP)" FROM table_4303 WHERE "GDP at current prices (USD billions)" = '142.640'
SELECT "Current account balance (percent of GDP)" FROM "table_4303" WHERE "GDP at current prices (USD billions)" = '142.640'