| Year | Trade potential |
| 2009 | 8924.56 |
| 2010 | 10,306.70 |
| 2011 | 12,413.22 |
| 2012 | 13,501.24 |
| 2013 | 13,140.52 |
| 2014 | 13,465.37 |
| 2015 | 10,178.68 |
| 2016 | 8519.35 |
| 2017 | 11,652.35 |
| 2018 | 12,173.06 |