| The twenty largest countries by agricultural output in 2015, according to the IMF and CIA World Factbook. |
| The twenty largest countries by tertiary output in 2015, according to the IMF and CIA World Factbook. |
| The twenty largest countries by tertiary output in 2016, according to the IMF and CIA World Factbook. |
| The Factbook is available in the form of a website that is partially updated every week. |
| Scholars have acknowledged that some entries in the Factbook are out of date. |
| According to The World Factbook, Macau has the fourth highest life expectancy in the world. |
