Graph
Year | Totals | Observation hours |
---|---|---|
2000 | 0 | 93:00 |
2001 | 423 | 287:00 |
2002 | 34 | 316:00 |
2003 | 123 | 382:42 |
2004 | 2716 | 342:37 |
2005 | 1793 | 554:39 |
2006 | 1455 | 657:43 |
2007 | 4714 | 725:19 |
2008 | 3115 | 1488:17 |
2009 | 3358 | 799:54 |
2010 | 3349 | 900:27 |
2011 | 5901 | 834:45 |
2012 | 7000 | 840:54 |
2013 | 10576 | 890:41 |
2014 | 6454 | 864:15 |
2015 | 20456 | 727:16 |
2016 | 11341 | 659:29 |
2017 | 2477 | 777:46 |
2018 | 6309 | 766:48 |
2019 | 4440 | 683:31 |
2020 | 24934 | 839:09 |
2021 | 5867 | 921:00 |