Jahr  MPECS Discovery Observations
1993      0         0            0
1994      0         0            0
1995      2         0           16
1996     13         5           37
1997     12         1           43
1998     10         1           31
1999      8         0           35
2000      2         1           11
2001      0         0            0
2002     51         0          539
2003     14         0          132
2004     11         0           48
2005      2         0           34
2006     11         0           84
2007      1         0            9
2008     57         0          482
2009     58         0          385
2010     47         0          523
2011     21         0          447
2012     21         0          519
2013     20         0          434
2014     21         0          486
2015     15         0          517
2016     15         0          439
2017     14         0          598
2018     13         0          282
2019     12         4          388
2020     15         3          257
2021     13         0          392
2022     13         0          458
2023     22         3          447
2024     13         0          273