| Year | 1/20 oz | 1/10 oz | 1/4 oz | 1/2 oz | 1 oz |
| 1989 | 0 | 0 | 0 | 704 | 0 |
| 2004 | 0 | 0 | 1,000 | 0 | 0 |
| 2005 | 400 | 400 | 2,600 | 400 | 250 |
| 2006 | 520 | 520 | 2,120 | 520 | 520 |
| 2007 | 500 | 500 | 1,500 | 500 | 500 |
| 2008 | 500 | 500 | 800 | 500 | 500 |
| 2009 | 600 | 600 | 1,700 | 600 | 600 |
| 2010 | 600 | 600 | 1,000 | 600 | 600 |
| 2011 | 1,100 | 1,100 | 2,000 | 1,100 | 1,100 |
| 2012 | 0 | 0 | 0 | 0 | 0 |
| 2013 | 300 | 300 | 600 | 300 | 400 |
| 2014 | 250 | 250 | 250 | 250 | 250 |
| 2015 | 500 | 500 | 500 | 500 | 500 |
| 2016 | 2,100 | 2,100 | 2,100 | 2,100 | 2,100 |
| 2017 | 600 | 1,500 | 1,500 | 700 | 600 |
| 2018 | 1,000 | 1,500 | 1,000 | 1,000 (P) 1,000 (RP) | 1,000 (P) 1,000 (RP) |
| 2019 | 1,000 | 1,000 | 800 | 650 (P) 500 (RP) | 750 (P) 500 (RP) |
| 2020 | 250 | 250 | 250 | 250 (P) 250 (RP) | 250 (P) 250 (RP) |
| 2021 | 350 | 450 | 450 | 450 (P) 500 (RP) | 500 (P) 500 (RP) |
| 2022 | 1,200 | 1,100 | 1,400 | 1,000 (P) 500 (RP) | 1,300 (P) 500 (RP) |
| 2023 | 1,000 | 1,000 | 1,000 | 1,000 (P) 1,000 (RP) | 1,000 (P) 1,000 (RP) |
| 2024 | 2,300 | 2,400 | 2,200 | 2,380 (P) 2,500 (RP) | 1,900 (P) 2,500 (RP) |
| 2025 | 0 | 0 | 0 | 0 | 0 |