Graph
Year | Totals | Observation hours |
---|---|---|
1956 | 0 | 13:45 |
1958 | 1 | 11:00 |
1959 | 0 | 3:20 |
1960 | 0 | 1:45 |
1961 | 1 | 8:30 |
1962 | 0 | 0:00 |
1963 | 0 | 8:00 |
1977 | 0 | 29:30 |
1978 | 2 | 27:30 |
1982 | 0 | 3:00 |
1986 | 0 | 50:00 |
1987 | 0 | 56:35 |
2001 | 0 | 0:00 |
2002 | 0 | 0:00 |
2003 | 0 | 12:30 |
2004 | 9 | 44:15 |
2005 | 1470 | 1018:50 |
2006 | 1441 | 647:30 |
2007 | 1665 | 816:41 |
2008 | 522 | 648:15 |
2009 | 614 | 446:08 |
2010 | 329 | 645:00 |
2011 | 569 | 681:30 |
2012 | 134 | 422:55 |
2013 | 114 | 613:10 |
2014 | 226 | 473:05 |
2015 | 246 | 560:45 |
2016 | 421 | 427:55 |
2017 | 355 | 576:05 |
2018 | 71 | 430:45 |
2019 | 335 | 455:27 |
2020 | 315 | 506:07 |
2021 | 428 | 1023:39 |
2022 | 257 | 446:43 |