| Countries | Percentage of all couples | Reference year |
|---|---|---|
| Quebec | 34.6 | 2006 |
| Sweden | 25.4 | 2005 |
| Finland | 23.9 | 2006 |
| New Zealand | 23.7 | 2006 |
| Denmark | 22.2 | 2007 |
| Iceland | 19.9 | 2006 |
| Canada | 18.4 | 2006 |
| United Kingdom | 15.5 | 2004 |
| Australia | 14.8 | 2006 |
| Ireland | 14.1 | 2006 |
| Other provinces and territories | 13.4 | 2006 |
| Source: Milan et al., 2007. | ||