| Country | Years | Debut | Most Recent | Best Finish | % Correct |
|---|---|---|---|---|---|
| Argentina | 13 | 2008 (8th) | 2024 (5th) | 3rd (2016) | 100%
|
| Canada | 2 | 2008 (12th) | 2009 (14th/Relegated) | 12th (2008) | 100%
|
| England | 13 | 2008 (2nd) | 2024 (1st) | Champions (2013,2014,2016,2024) | 100%
|
| Fiji | 9 | 2008 (14th) | 2024 (12th/Relegated) | 6th (2013) | 100%
|
| France | 13 | 2008 (6th) | 2024 (2st) | Champions (2018,2019,2023) | 100%
|
| Georgia | 5 | 2016 (10th) | 2024 (9th) | 8th (2023) | 100%
|
| Ireland | 13 | 2008 (9th) | 2024 (4th) | 2nd (2016,2023) | 100%
|
| Italy | 11 | 2008 (11th) | 2024 (10th) | 8th (2017) | 100%
|
| New Zealand | 13 | 2008 (Champions) | 2024 (3rd) | Champions (2008,2009,2011,2012,2015,2017) | 100%
|
| Samoa | 8 | 2008 (7th) | 2017 (12th/Relegated) | 7th (2008,2009) | 100%
|
| Scotland | 12 | 2008 (10th) | 2019 (12th/Relegated) | 5th (2016) | 100%
|
| South Africa | 13 | 2008 (3rd) | 2024 (7th) | Champions (2013) | 100%
|
| Spain | 1 | 2024 (11th) | 2024 (11th) | 11th (2024) | 100%
|
| Tonga | 4 | 2008 (13th) | 2011 (12th/Relegated) | 10th (2009) | 100%
|
| United States | 2 | 2008 (16th/Relegated) | 2013 (12th/Relegated) | 12th (2013) | 100%
|
| Wales | 13 | 2008 (4th) | 2024 (8th) | 2nd (2013) | 100%
|
| Australia | 13 | 2008 (5th) | 2024 (6th) | 2nd (2010,2019) | 67%
|
| Japan | 6 | 2008 (15th) | 2023 (12th Relegated) | 10th (2015) | 67%
|
| Uruguay | 1 | 2009 (16th/Relegated) | 2009 (12th/Relegated) | 16th (2009) | 67%
|