| Fig7-1 | ||
| År | SPN | SPU |
| 1996 | 103 | 48 |
| 1997 | 111 | 113 |
| 1998 | 111 | 172 |
| 1999 | 121 | 222 |
| 2000 | 128 | 386 |
| 2001 | 134 | 613 |
| 2002 | 136 | 608 |
| 2003 | 158 | 845 |
| 2004 | 175 | 1015 |
| 2005 | 191 | 1398 |
| 2006 | 107 | 1782 |
| 2007 | 117 | 2017 |
| 2008 | 88 | 2273 |
| 2009 | 117 | 2637 |
| 2010 | 135 | 3074 |
| 2011 | 129 | 3309 |
| 2012 | 145 | 3814 |
| 2013 | 168 | 5035 |
| 2014 | 186 | 6428 |
| 2015 | 198 | 7471 |
| 2016 | 212 | 7507 |
| 2017 | 240 | 8484 |
| 2018 | 239 | 8251 |
| 2019 | 269 | 10084 |
| 2020 | 292 | 10908 |
| 2021 | 333 | 12340 |
| 2022 | 318 | 12429 |
| 2023 | 354 | 15757 |
| 2024 | 379 | 17733 |