| 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Canadá | 778 | 1.602 | 1.929 | 1.823 | 1.736 | 1.507 | 1.619 | 1.353 | 1.510 | 1.493 | 1.440 | |
| México | 119 | 80 | 112 | 185 | 160 | 147 | 157 | 126 | 89 | 68 | 66 | 61 |
| Estados Unidos de América | 5.380 | 8.077 | 7.109 | 7.259 | 7.757 | 7.369 | 6.795 | 5.800 | 5.766 | 5.686 | 5.007 | 4.659 |