Graph
Year | Totals | Observation hours |
---|---|---|
1983 | 1010 | 9:15 |
1984 | 1160 | 27:20 |
1985 | 3277 | 29:00 |
1986 | 4684 | 69:40 |
1987 | 2684 | 47:00 |
1988 | 175 | 17:30 |
1989 | 7415 | 45:00 |
1990 | 9707 | 35:30 |
1991 | 1655 | 48:28 |
1992 | 9792 | 45:00 |
1993 | 7141 | 51:30 |
1994 | 1615 | 27:30 |
1995 | 1829 | 50:00 |
1996 | 1797 | 49:15 |
1997 | 1452 | 34:50 |
1998 | 3969 | 50:00 |
1999 | 2552 | 57:20 |
2000 | 3856 | 42:30 |
2001 | 12128 | 69:35 |
2002 | 4806 | 76:40 |
2003 | 3611 | 108:30 |
2004 | 5207 | 111:45 |
2005 | 8252 | 145:21 |
2006 | 7705 | 152:17 |
2007 | 12216 | 187:59 |
2008 | 9121 | 132:42 |
2009 | 10084 | 75:32 |
2010 | 14158 | 236:16 |
2011 | 16161 | 281:19 |
2012 | 26896 | 394:00 |
2013 | 26413 | 408:08 |
2014 | 24145 | 481:30 |
2015 | 48622 | 400:00 |
2016 | 20127 | 467:00 |
2017 | 27681 | 490:30 |
2018 | 79981 | 442:30 |
2019 | 105484 | 431:54 |
2020 | 44657 | 451:00 |
2021 | 29703 | 382:00 |
2022 | 61542 | 317:58 |