The economy you described in your question is called a market economy. It has free markets and the production of goods and services are determined by the consumers.
The answer is 1918' or if you are going to the nearest decade that would be the 1920's.
The Gulf Coast (not to be confused with the American Gulf Coast) contains significant oil and natural gas deposits.
Hope this helps!
The answered to your question is rudder. The rudder is a fin-like object on the back of a ship. It allows the ship to not rely completely on the sails to change direction.
