| Country Usage (%) |
| Nauru | 95.15 in 2019 | WHO |
| Haiti | 76.53 in 2022 | WHO |
| Marshall Islands | 64.07 in 2022 | WHO |
| Micronesia (Federated States of) | 54.68 in 2014 | WHO |
| Papua New Guinea | 33.81 in 2022 | WHO |
| Kiribati | 32.99 in 2022 | WHO |
| Solomon Islands | 24.47 in 2021 | WHO |
| Vanuatu | 21.46 in 2022 | WHO |
| Guyana | 15.71 in 2022 | WHO |
| Dominican Republic | 14.99 in 2022 | WHO |
| Bolivia | 13.74 in 2022 | WHO |
| Cuba | 11.23 in 2022 | WHO |
| Suriname | 10.78 in 2022 | WHO |
| Guatemala | 9.33 in 2022 | WHO |
| Venezuela (Bolivarian Republic of) | 8.36 in 2015 | WHO |
| Jamaica | 6.57 in 2022 | WHO |
| Samoa | 5.87 in 2022 | WHO |
| Colombia | 5.14 in 2022 | WHO |
| Honduras | 4.17 in 2022 | WHO |
| El Salvador | 4.13 in 2022 | WHO |
| Belize | 3.64 in 2022 | WHO |
| Peru | 2.76 in 2022 | WHO |
| Nicaragua | 2.03 in 2020 | WHO |
| Palau | 1.19 in 2022 | WHO |
| Panama | 1.16 in 2022 | WHO |
| Antigua and Barbuda | 1 in 2022 | WHO |
| Argentina | 1 in 2022 | WHO |
| Brazil | 1 in 2022 | WHO |
| Chile | 1 in 2022 | WHO |
| Costa Rica | 1 in 2022 | WHO |
| Ecuador | 1 in 2022 | WHO |
| Falkland Islands | 1 in 2022 | WHO |
| Fiji | 1 in 2022 | WHO |
| Mexico | 1 in 2022 | WHO |
| Paraguay | 1 in 2022 | WHO |
| Saint Lucia | 1 in 2022 | WHO |
| Saint Vincent and the Grenadines | 1 in 2018 | WHO |
| Tonga | 1 in 2022 | WHO |
| Tuvalu | 1 in 2022 | WHO |
| Uruguay | 1 in 2022 | WHO |
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