Without upper houses
| States |
|---|
| Albania |
| Andorra |
| Angola |
| Saudi Arabia |
| Armenia |
| Azerbaijan |
| Bangladesh |
| Benin |
| Bulgaria |
| Burkina Faso |
| Cap Verde |
| China |
| North Korea |
| South Korea |
| Costa Rica |
| Croatia |
| Cuba |
| Denmark |
| Dominica |
| Egypt |
| El Salvador |
| United Arab Emirates |
| Ecuador |
| Estonia |
| Fiji |
| Gambia |
| Georgia |
| Ghana |
| Greece |
| Guatemala |
| Guinea |
| Guinea Bissau |
| Guyana |
| Honduras |
| Hungary |
| Indonesia |
| Iran |
| Iceland |
| Kuwait |
| Laos |
| Latvia |
| Lebanon |
| Liechtenstein |
| Lithuania |
| Macedonia (FYROM) |
| Malawi |
| Maldives |
| Mali |
| Marshall Islands |
| Mauritania |
| Micronesia |
| Moldova |
| Monaco |
| Mongolia |
| Montenegro |
| Mozambique |
| Nauru |
| Nicaragua |
| Niger |
| Norway |
| New Zealand |
| Uganda |
| Palestinian Authority |
| Panama |
| Papua New Guinea |
| Peru |
| Portugal |
| Saint Kitts and Nevis |
| San Marino |
| St. Vincent and the Grenadines |
| Solomon Islands |
| Sao Tome and Principe |
| Senegal |
| Serbia |
| Sierra Leone |
| Slovakia |
| Sweden |
| Suriname |
| Syria |
| Taiwan |
| Togo |
| Tunisia |
| Turkey |
| Ukraine |
| Venezuela |
| Vietnam |
| Zambia |
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