| Zimbabwe | Not Started - Seeking Researchers | | |
| Zambia | Not Started - Seeking Researchers | | |
| Yemen | Not Started - Seeking Researchers | | |
| Western Sahara | Not Started - Seeking Researchers | | |
| Wallis and Futuna | Not Started - Seeking Researchers | | |
| Virgin Islands, U.S. | Not Started - Seeking Researchers | | |
| Virgin Islands, British | Not Started - Seeking Researchers | | |
| Vietnam | Not Started - Seeking Researchers | | |
| Venezuela | Not Started - Seeking Researchers | | |
| Vanuatu | Not Started - Seeking Researchers | | |
| Uzbekistan | Not Started - Seeking Researchers | | |
| US Minor Outlying Islands | Not Started - Seeking Researchers | | |
| Uruguay | Not Started - Seeking Researchers | | |
| United States | Not Started - Seeking Researchers | | |
| United Kingdom | In Process | | |
| United Arab Emirates | Not Started - Seeking Researchers | | |
| Ukraine | In Process - Seeking Additional Researchers | | |
| Uganda | Not Started - Seeking Researchers | | |
| Tuvalu | Not Started - Seeking Researchers | | |
| Turks and Caicos Islands | Not Started - Seeking Researchers | | |
| Turkmenistan | Not Started - Seeking Researchers | | |
| Turkey | In Process | | |
| Tunisia | Not Started - Seeking Researchers | | |
| Trinidad and Tobago | Not Started - Seeking Researchers | | |
| Tonga | Not Started - Seeking Researchers | | |
| Tokelau | Not Started - Seeking Researchers | | |
| Togo | Not Started - Seeking Researchers | | |
| Timor-Leste | In Process - Seeking Additional Researchers | | |
| Thailand | Not Started - Seeking Researchers | | |
| Tanzania | Not Started - Seeking Researchers | | |
| Tajikistan | Not Started - Seeking Researchers | | |
| Taiwan | Not Started - Seeking Researchers | | |
| Syria | Not Started - Seeking Researchers | | |
| Switzerland | Not Started - Seeking Researchers | | |
| Sweden | In Process - Seeking Additional Researchers | | |
| Suriname | Not Started - Seeking Researchers | | |
| Sudan | In Process - Seeking Additional Researchers | | |
| Sri Lanka | In Process - Seeking Additional Researchers | | |
| Spain | In Process - Seeking Additional Researchers | | |
| South Sudan | Not Started - Seeking Researchers | | |
| South Korea | In Process - Seeking Additional Researchers | | |
| South Africa | In Process - Seeking Additional Researchers | | |
| Somalia | Not Started - Seeking Researchers | | |
| Solomon Islands | Not Started - Seeking Researchers | | |
| Slovenia | Not Started - Seeking Researchers | | |
| Slovakia | Not Started - Seeking Researchers | | |
| Sint Maarten | Not Started - Seeking Researchers | | |
| Singapore | Not Started - Seeking Researchers | | |
| Sierra Leone | Not Started - Seeking Researchers | | |
| Seychelles | Not Started - Seeking Researchers | | |