Domestic Travel
Visit the Travel Facts and Statistics website.

Why do people travel and what is the % of each category?
What are the top leisure travel activities of domestic travelers?
What is the criteria for a person trip?
How much is the economic output generated by visitors?

International Travel
Visit the World Tourism council web page.

In the front it tells you about what their purpose is, In own words what do they stand for?
Describe the type of members
What is the economic impact of tourism?