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     12         4           65
2001     36         4          185
2002     48         5          332
2003      0         0            0
2004      0         0            0
2005     27         0          187
2006     27         0          211
2007     35         2          198
2008      0         0            0
2009     13         0           77
2010     48         2          253
2011     52         1          406
2012     37         5          281
2013     29         4          161
2014     31         0          203
2015     45         4          265
2016     28         4          159
2017     35         4          176
2018     27         5          152
2019     47        18          252
2020     26        10          143
2021      0         0            0