Graph
Year | Totals | Observation hours |
---|---|---|
1956 | 27 | 13:45 |
1958 | 2 | 11:00 |
1959 | 1 | 3:20 |
1960 | 7 | 1:45 |
1961 | 2 | 8:30 |
1962 | 0 | 0:00 |
1963 | 4 | 8:00 |
1977 | 19 | 29:30 |
1978 | 60 | 27:30 |
1982 | 1 | 3:00 |
1986 | 52 | 50:00 |
1987 | 44 | 56:35 |
2001 | 0 | 0:00 |
2002 | 0 | 0:00 |
2003 | 5 | 12:30 |
2004 | 2 | 44:15 |
2005 | 1165 | 1018:50 |
2006 | 1827 | 647:30 |
2007 | 1345 | 816:41 |
2008 | 1193 | 648:15 |
2009 | 970 | 446:08 |
2010 | 1664 | 645:00 |
2011 | 1816 | 681:30 |
2012 | 1105 | 422:55 |
2013 | 1700 | 613:10 |
2014 | 620 | 473:05 |
2015 | 798 | 560:45 |
2016 | 647 | 427:55 |
2017 | 987 | 576:05 |
2018 | 599 | 430:45 |
2019 | 417 | 455:27 |
2020 | 758 | 506:07 |
2021 | 1568 | 1023:39 |
2022 | 344 | 345:42 |