Jahr  MPECS Discovery Observations
1993      1         0            3
1994      2         0            4
1995      1         0            3
1996      4         0           17
1997      0         0            0
1998      4         0           22
1999      7         0           25
2000      1         0            2
2001     15         0           34
2002     33         0          130
2003     42         0          141
2004     82         0          317
2005     74         0          240
2006     33         1          192
2007     58         0          215
2008     53         0          512
2009     39         0          144
2010     73         1          300
2011     30         0          335
2012     29         0          466
2013     32         0          705
2014     26         0          440
2015     26         3          407
2016     17         0          249
2017     15         0          352
2018     13         2          141
2019     10         5          302
2020      9         3           52
2021      2         0            7
2022      3         0           25
2023      0         0            0