Table schema:
CREATE TABLE table_30133_1 (export_volume_of_goods_and_services__percent_change_ VARCHAR, gdp_at_current_prices__usd_billions_ VARCHAR)

Question: How many export volume of goods and services values are associated with GDP at current prices of 161.340?
SQL: SELECT COUNT(export_volume_of_goods_and_services__percent_change_) FROM table_30133_1 WHERE gdp_at_current_prices__usd_billions_ = "161.340"