| Country or Area | Subgroup | Year | Source | Unit | Value | |
|---|
| Afghanistan | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 4 |
| Albania | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 19 |
| Armenia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 13 |
| Australia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 31 |
| Austria | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 24 |
| Azerbaijan | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 5 |
| Bangladesh | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 17 |
| Belarus | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 22 |
| Belgium | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 18 |
| Benin | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 4 |
| Bhutan | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 12 |
| Bolivia (Plurinational State of) | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 19 |
| Brazil | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 50 |
| Bulgaria | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 31 |
| Burkina Faso | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 2 |
| Burundi | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 4 |
| Cambodia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 3 |
| Cameroon | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 2 |
| Canada | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 26 |
| Cape Verde | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 11 |
| Central African Republic | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 5 |
| Chad | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 2 |
| China | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 27 |
| Colombia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 43 |
| Congo | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 3 |
| Costa Rica | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 21 |
| Côte d'Ivoire | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 6 |
| Croatia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 19 |
| Czech Republic | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 20 |
| Democratic People's Republic of Korea | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 13 |
| Democratic Republic of the Congo | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 7 |
| Denmark | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 21 |
| Djibouti | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 12 |
| Dominican Republic | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 42 |
| East Asia and Pacific | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 23 |
| Eastern and Southern Africa | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 4 |
| Ecuador | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 26 |
| Egypt | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 28 |
| El Salvador | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 25 |
| Eritrea | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 3 |
| Ethiopia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 2 |
| Finland | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 16 |
| France | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 21 |
| Gabon | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 6 |
| Gambia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 3 |
| Georgia | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 24 |
| Germany | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 29 |
| Ghana | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 11 |
| Guatemala | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 16 |
| Guinea | Total | 2007-2012 | UN_Demographic and Health Surveys (DHS) and other national surveys | Percent | 2 |
