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      0         0            0
2000     40         0          100
2001     29         0           74
2002     30         1           78
2003     10         0           29
2004     15         0           48
2005      9         1           19
2006      8         0           20
2007      4         0           11
2008      0         0            0
2009      1         0            2
2010      2         0            5
2011      1         0            2
2012      1         0            2
2013      1         0            2
2014      3         0            6
2015      1         0            2
2016      0         0            0
2017      1         0            2
2018      1         0            2
2019      5         0           12
2020      3         0            8
2021      0         0            0