Graph
Year | Totals | Observation hours |
---|---|---|
1956 | 0 | 13:45 |
1958 | 0 | 11:00 |
1959 | 0 | 3:20 |
1960 | 1 | 1:45 |
1961 | 1 | 8:30 |
1962 | 0 | 0:00 |
1963 | 0 | 8:00 |
1977 | 731 | 29:30 |
1978 | 615 | 27:30 |
1982 | 3 | 3:00 |
1986 | 2721 | 50:00 |
1987 | 5800 | 56:35 |
2001 | 0 | 0:00 |
2002 | 0 | 0:00 |
2003 | 0 | 12:30 |
2004 | 496 | 44:15 |
2005 | 45792 | 1018:50 |
2006 | 19874 | 647:30 |
2007 | 51628 | 816:41 |
2008 | 17619 | 648:15 |
2009 | 8539 | 446:08 |
2010 | 12533 | 645:00 |
2011 | 13586 | 681:30 |
2012 | 16365 | 422:55 |
2013 | 5304 | 613:10 |
2014 | 10010 | 473:05 |
2015 | 6449 | 560:45 |
2016 | 4293 | 427:55 |
2017 | 15493 | 576:05 |
2018 | 15598 | 430:45 |
2019 | 4566 | 455:27 |
2020 | 15179 | 506:07 |
2021 | 26669 | 1013:52 |
2022 | 13561 | 726:25 |
2023 | 572 | 15:30 |