Jahr  MPECS Discovery Observations
1993      0         0            0
1994      0         0            0
1995      0         0            0
1996      1         0            4
1997     18        15           63
1998      2         2            5
1999      3         0           17
2000      0         0            0
2001      3         0           11
2002     12         0           68
2003     18         0          108
2004     30         0          265
2005     17         0          221
2006     10         0          103
2007     18         0          408
2008     13         0           61
2009      8         0           35
2010      2         0            5
2011      1         0            1
2012      2         0           12
2013      0         0            0
2014      1         0            6
2015     12         0           38
2016     14         0           40
2017     13         0           38
2018      8         0           27
2019     17         1           64
2020      6         0           19
2021      2         0            6
2022      6         0           20
2023      2         0           11