Graph
Year | Totals | Observation hours |
---|---|---|
1997 | 843 | 63:45 |
1998 | 643 | 48:00 |
1999 | 311 | 79:45 |
2000 | 491 | 114:15 |
2001 | 3747 | 130:55 |
2002 | 1494 | 311:10 |
2003 | 5385 | 434:00 |
2004 | 5532 | 539:15 |
2005 | 5004 | 741:30 |
2006 | 4799 | 671:30 |
2007 | 4558 | 742:30 |
2008 | 4963 | 700:00 |
2009 | 3583 | 629:45 |
2010 | 9327 | 570:15 |
2011 | 4122 | 520:15 |
2012 | 4873 | 543:15 |
2013 | 9782 | 410:30 |
2014 | 5884 | 500:15 |
2015 | 3598 | 683:45 |
2016 | 3141 | 688:45 |
2017 | 4907 | 671:00 |
2018 | 3756 | 739:00 |
2019 | 5384 | 737:00 |
2020 | 4810 | 795:00 |
2021 | 4199 | 787:15 |
2022 | 1049 | 404:50 |