Jahr  MPECS Discovery Observations
1993      0         0            0
1994      0         0            0
1995      0         0            0
1996      0         0            0
1997      0         0            0
1998      0         0            0
1999      1         0            3
2000     23         4          122
2001     53         4          273
2002     67         5          500
2003      0         0            0
2004      0         0            0
2005     32         0          208
2006     38         0          337
2007     40         2          257
2008      0         0            0
2009     14         0           82
2010     58         2          298
2011     78         1          683
2012     61         5          462
2013     49         4          322
2014     49         0          340
2015     69         4          450
2016     50         4          356
2017     45         4          228
2018     42         5          252
2019     51        18          260
2020     26        10          143
2021     21         6           76
2022      4         0           12
2023      0         0            0