Graph
Year | Totals | Observation hours |
---|---|---|
1983 | 0 | 9:15 |
1984 | 14 | 27:20 |
1985 | 79 | 29:00 |
1986 | 43 | 69:40 |
1987 | 12 | 47:00 |
1988 | 7 | 17:30 |
1989 | 93 | 45:00 |
1990 | 17 | 35:30 |
1991 | 34 | 48:28 |
1992 | 29 | 45:00 |
1993 | 13 | 51:30 |
1994 | 6 | 27:30 |
1995 | 28 | 50:00 |
1996 | 24 | 49:15 |
1997 | 21 | 34:50 |
1998 | 8 | 50:00 |
1999 | 37 | 57:20 |
2000 | 48 | 42:30 |
2001 | 61 | 69:35 |
2002 | 77 | 76:40 |
2003 | 197 | 108:30 |
2004 | 97 | 111:45 |
2005 | 156 | 145:21 |
2006 | 188 | 152:17 |
2007 | 153 | 187:59 |
2008 | 78 | 132:42 |
2009 | 29 | 75:32 |
2010 | 216 | 236:16 |
2011 | 432 | 281:19 |
2012 | 603 | 394:00 |
2013 | 254 | 408:08 |
2014 | 658 | 481:30 |
2015 | 307 | 400:00 |
2016 | 596 | 467:00 |
2017 | 280 | 490:30 |
2018 | 1115 | 442:30 |
2019 | 1639 | 431:54 |
2020 | 1058 | 451:00 |
2021 | 1098 | 382:00 |