| Year | |
|---|---|
| 1998 | 203 |
| 1999 | 2,429 |
| 2000 | 2,435 |
| 2001 | 3,716 |
| 2002 | 4,937 |
| 2003 | 10,756 |
| 2004 | 12,680 |
| 2005 | 12,314 |
| 2006 | 12,976 |
| 2007 | 16,773 |
| 2008 | 13,691 |
| 2009 | 10,250 |
| 2010 | 11,005 |
| 2011 | 9,950 |
| 2012 | 9,769 |
| 2013 | 9,945 |
| 2014 | 11,343 |
| 2015 | 11,033 |
| 2016 | 12,348 |
| 2017 | 20,826 |
| 2018 | 20,541 |
| 2019 | 16,095 |
| 2020 | 13,507 |
| 2021 | 15,046 |
| 2022 | 14,295 |
| 2023 | 14,193 |