Explanation:

- Export Duty: A tax levied on goods being exported from a country. It generates revenue for the government, but it's a type of tax revenue.

- Import Duty: A tax imposed on imported goods. Similar to export duties, this is also a form of tax revenue.

- Dividends: Payments made by a corporation to its shareholders from its profits. For governments, these earnings from investments in public enterprises represent non-tax revenue.

- Excise: An internal tax on the sale or consumption of a particular good, such as alcohol or tobacco. This is tax revenue.