| 1996 | 20,265 | 20,369 | 19,581 | 21,421 |
| 1997 | 21,401 | 21,756 | 21,178 | 23,335 |
| 1998 | 23,040 | 23,266 | 22,010 | 23,018 |
| 1999 | 22,457 | 22,515 | 21,857 | 24,257 |
| 2000 | 23,759 | 23,830 | 22,949 | 25,075 |
| 2001 | 24,563 | 24,834 | 23,583 | 25,649 |
| 2002 | 24,856 | 25,476 | 24,580 | 26,875 |
| 2003 | 26,182 | 26,787 | 25,709 | 27,918 |
| 2004 | 27,417 | 28,299 | 27,622 | 30,373 |
| 2005 | 29,114 | 29,981 | 29,203 | 32,051 |
| 2006 | 30,847 | 31,880 | 30,845 | 34,057 |
| 2007 | 32,552 | 33,625 | 32,346 | 35,701 |
| 2008 | 34,538 | 35,308 | 33,496 | 35,969 |
| 2009 | 33,758 | 34,311 | 33,255 | 36,429 |
| 2010 | 34,410 | 36,512 | 35,749 | 39,143 |
| 2011 | 37,427 | 38,796 | 37,359 | 41,308 |
| 2012 | 39,680 | 41,317 | 39,836 | 43,591 |
| 2013 | 41,322 | 42,736 | 41,002 | 44,803 |
| 2014 | 42,333 | 43,462 | 41,538 | 45,576 |
| 2015 | 43,386 | 44,352 | 42,481 | 46,412 |
| 2016 | 44,668 | 44,912 | 43,328 | 46,819 |
| 2017 | 44,502 | 45,216 | 44,132 | 48,317 |
| 2018 | 46,516 | 47,701 | 45,193 | 50,025 |
| 2019 | 47,094 | 48,273 | 46,616 | 48,653 |
| 2020 | 46,990 | 41,070 | 42,204 | 48,661 |
| 2021 | 47,233 | 48,597 | 49,036 | 54,304 |
| 2022 | 50,112 | 50,782 | 49,389 | 53,177 |
| 2023 | 49,969 | 50,729 | 50,075 | 53,747 |
| 2024 | 51,630 | 51,348 | 51,073 | 55,879 |
| 2025 | 52,814 | | | |
|