| 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Australia | 609 | 1,074 | 1,395 | 1,430 | 1,332 | 1,287 | 1,233 | 1,227 | 1,295 | 1,200 | 979 | 848 |
| Canada | 1,703 | 1,941 | 2,076 | 2,484 | 2,004 | 1,890 | 1,747 | 2,010 | 2,241 | 2,422 | 2,609 | 2,676 |
| Japan | 902 | 734 | 800 | 957 | 873 | 697 | 1,009 | 1,113 | 923 | 481 | 533 | 260 |
| Singapore | 336 | 300 | 305 | 318 | 301 | 201 | 227 | 250 | 271 | 268 |