Graph
Year | Totals | Observation hours |
---|---|---|
1956 | 4403 | 13:45 |
1958 | 2605 | 11:00 |
1959 | 324 | 3:20 |
1960 | 200 | 1:45 |
1961 | 1177 | 8:30 |
1962 | 0 | 0:00 |
1963 | 2176 | 8:00 |
1977 | 2535 | 29:30 |
1978 | 16527 | 27:30 |
1982 | 344 | 3:00 |
1986 | 334 | 50:00 |
1987 | 4588 | 56:35 |
2001 | 0 | 0:00 |
2002 | 0 | 0:00 |
2003 | 365 | 12:30 |
2004 | 1859 | 44:15 |
2005 | 62180 | 1018:50 |
2006 | 38868 | 647:30 |
2007 | 39811 | 816:41 |
2008 | 31925 | 648:15 |
2009 | 15559 | 446:08 |
2010 | 24353 | 645:00 |
2011 | 24764 | 681:30 |
2012 | 14595 | 422:55 |
2013 | 39252 | 613:10 |
2014 | 29952 | 473:05 |
2015 | 18564 | 560:45 |
2016 | 18612 | 427:55 |
2017 | 35369 | 576:05 |
2018 | 22625 | 430:45 |
2019 | 23710 | 455:27 |
2020 | 16256 | 506:07 |
2021 | 46577 | 1013:52 |
2022 | 39557 | 726:25 |
2023 | 2799 | 88:04 |