Graph
Year | Totals | Observation hours |
---|---|---|
1983 | 5 | 9:15 |
1984 | 5 | 27:20 |
1985 | 15 | 29:00 |
1986 | 2 | 69:40 |
1987 | 75 | 47:00 |
1988 | 0 | 17:30 |
1989 | 5 | 45:00 |
1990 | 9 | 35:30 |
1991 | 25 | 48:28 |
1992 | 50 | 45:00 |
1993 | 17 | 51:30 |
1994 | 3 | 27:30 |
1995 | 51 | 50:00 |
1996 | 30 | 49:15 |
1997 | 39 | 34:50 |
1998 | 13 | 50:00 |
1999 | 26 | 57:20 |
2000 | 18 | 42:30 |
2001 | 47 | 69:35 |
2002 | 131 | 76:40 |
2003 | 146 | 108:30 |
2004 | 65 | 111:45 |
2005 | 264 | 145:21 |
2006 | 150 | 152:17 |
2007 | 1041 | 187:59 |
2008 | 340 | 132:42 |
2009 | 61 | 75:32 |
2010 | 847 | 236:16 |
2011 | 773 | 281:19 |
2012 | 722 | 394:00 |
2013 | 194 | 408:08 |
2014 | 408 | 481:30 |
2015 | 206 | 400:00 |
2016 | 165 | 467:00 |
2017 | 357 | 490:30 |
2018 | 384 | 442:30 |
2019 | 742 | 431:54 |
2020 | 1051 | 451:00 |
2021 | 3206 | 382:00 |
2022 | 631 | 317:58 |