Jahr  MPECS Discovery Observations
1993      0         0            0
1994      0         0            0
1995      2         0           22
1996     19        12           69
1997     16         3           37
1998      0         0            0
1999      0         0            0
2000     86        21          356
2001    264        62         1472
2002    261        34         1346
2003    318        40         1712
2004    207         6         1272
2005    127         9          580
2006     37         0          148
2007     25         0          102
2008     13         0           52
2009     14         0           60
2010     21         0          127
2011     21         0           79
2012     25         0           89
2013     14         0           61
2014     22         0           99
2015     20         0          171
2016     22         0          153
2017     15         0           66
2018     63         0          705
2019     21         0          104
2020     12         0           50
2021     12         0           66
2022      2         1            8
2023      0         0            0