Graph
Year | Totals | Observation hours |
---|---|---|
1983 | 34 | 9:15 |
1984 | 27 | 27:20 |
1985 | 31 | 29:00 |
1986 | 74 | 69:40 |
1987 | 70 | 47:00 |
1988 | 20 | 17:30 |
1989 | 46 | 45:00 |
1990 | 102 | 35:30 |
1991 | 52 | 48:28 |
1992 | 20 | 45:00 |
1993 | 19 | 51:30 |
1994 | 99 | 27:30 |
1995 | 99 | 50:00 |
1996 | 166 | 49:15 |
1997 | 66 | 34:50 |
1998 | 29 | 50:00 |
1999 | 54 | 57:20 |
2000 | 84 | 42:30 |
2001 | 148 | 69:35 |
2002 | 36 | 76:40 |
2003 | 73 | 108:30 |
2004 | 113 | 111:45 |
2005 | 166 | 145:21 |
2006 | 233 | 152:17 |
2007 | 139 | 187:59 |
2008 | 64 | 132:42 |
2009 | 28 | 75:32 |
2010 | 156 | 236:16 |
2011 | 68 | 281:19 |
2012 | 262 | 394:00 |
2013 | 183 | 408:08 |
2014 | 100 | 481:30 |
2015 | 26 | 400:00 |
2016 | 53 | 467:00 |
2017 | 28 | 490:30 |
2018 | 28 | 442:30 |
2019 | 113 | 431:54 |
2020 | 120 | 451:00 |
2021 | 68 | 382:00 |