Graph
Year | Totals | Observation hours |
---|---|---|
1997 | 3991 | 63:45 |
1998 | 1704 | 48:00 |
1999 | 826 | 79:45 |
2000 | 621 | 114:15 |
2001 | 6649 | 130:55 |
2002 | 8901 | 311:10 |
2003 | 14059 | 434:00 |
2004 | 11753 | 539:15 |
2005 | 16886 | 741:30 |
2006 | 15460 | 671:30 |
2007 | 16521 | 742:30 |
2008 | 24886 | 700:00 |
2009 | 16478 | 629:45 |
2010 | 15030 | 570:15 |
2011 | 13453 | 520:15 |
2012 | 20953 | 543:15 |
2013 | 10979 | 410:30 |
2014 | 13933 | 500:15 |
2015 | 8007 | 683:45 |
2016 | 11967 | 688:45 |
2017 | 20000 | 671:00 |
2018 | 20626 | 739:00 |
2019 | 21779 | 737:00 |
2020 | 20302 | 795:00 |
2021 | 10248 | 787:15 |
2022 | 2091 | 407:20 |