In this task, you are given a country name, and you need to return the year in which the country became independent. Independence is a nation's independence or statehood, usually after ceasing to be a group or part of another nation or state, or more rarely after the end of military occupation.

Example Input: South Korea
Example Output: 1948

Example Input: New Zealand
Example Output: 1907

Example Input: Marshall Islands
Example Output:
1990