Graph
Year | Totals | Observation hours |
---|---|---|
1997 | 193 | 63:45 |
1998 | 443 | 48:00 |
1999 | 1461 | 79:45 |
2000 | 2724 | 114:15 |
2001 | 2641 | 130:55 |
2002 | 8061 | 311:10 |
2003 | 14886 | 434:00 |
2004 | 20800 | 539:15 |
2005 | 42287 | 741:30 |
2006 | 26572 | 671:30 |
2007 | 20276 | 742:30 |
2008 | 13807 | 700:00 |
2009 | 20724 | 629:45 |
2010 | 59977 | 570:15 |
2011 | 36878 | 520:15 |
2012 | 30823 | 543:15 |
2013 | 22499 | 410:30 |
2014 | 12980 | 500:15 |
2015 | 19726 | 683:45 |
2016 | 29891 | 688:45 |
2017 | 29517 | 671:00 |
2018 | 26442 | 739:00 |
2019 | 22834 | 737:00 |
2020 | 31260 | 795:00 |
2021 | 31315 | 787:15 |
2022 | 14503 | 302:20 |